diff --git a/package.json b/package.json
index 46c5745..7869d63 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
   "devDependencies": {
     "backbone-metal": "^0.6.2",
     "benchmark": "^2.1.0",
-    "browserify": "^16.3.0",
+    "browserify": "^17.0.0",
     "klass": "^1.4.0",
     "mocha": "^5.0.0",
     "traceur-runtime": "0.0.59",
diff --git a/yarn.lock b/yarn.lock
index 2723556..3d19dfc 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -22,13 +22,21 @@ acorn-node@^1.3.0:
     acorn-walk "^6.1.0"
     xtend "^4.0.1"
 
+acorn-node@^1.5.2, acorn-node@^1.6.1:
+  version "1.8.2"
+  resolved "https://registry.yarnpkg.com/acorn-node/-/acorn-node-1.8.2.tgz#114c95d64539e53dede23de8b9d96df7c7ae2af8"
+  dependencies:
+    acorn "^7.0.0"
+    acorn-walk "^7.0.0"
+    xtend "^4.0.2"
+
 acorn-walk@^6.1.0:
   version "6.1.0"
   resolved "https://registry.yarnpkg.com/acorn-walk/-/acorn-walk-6.1.0.tgz#c957f4a1460da46af4a0388ce28b4c99355b0cbc"
 
-acorn@^1.0.3:
-  version "1.2.2"
-  resolved "https://registry.npmjs.org/acorn/-/acorn-1.2.2.tgz#c8ce27de0acc76d896d2b1fad3df588d9e82f014"
+acorn-walk@^7.0.0:
+  version "7.2.0"
+  resolved "https://registry.yarnpkg.com/acorn-walk/-/acorn-walk-7.2.0.tgz#0de889a601203909b0fbe07b8938dc21d2e967bc"
 
 acorn@^2.7.0:
   version "2.7.0"
@@ -38,12 +46,20 @@ acorn@^6.0.2:
   version "6.0.4"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.0.4.tgz#77377e7353b72ec5104550aa2d2097a2fd40b754"
 
+acorn@^7.0.0:
+  version "7.4.1"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-7.4.1.tgz#feaed255973d2e77555b83dbc08851a6c63520fa"
+
 ansi-styles@^3.2.1:
   version "3.2.1"
   resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-3.2.1.tgz#41fbb20243e50b12be0f04b8dedbf07520ce841d"
   dependencies:
     color-convert "^1.9.0"
 
+array-filter@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/array-filter/-/array-filter-1.0.0.tgz#baf79e62e6ef4c2a4c0b831232daffec251f9d83"
+
 array-filter@~0.0.0:
   version "0.0.1"
   resolved "https://registry.npmjs.org/array-filter/-/array-filter-0.0.1.tgz#7da8cf2e26628ed732803581fd21f67cacd2eeec"
@@ -70,11 +86,11 @@ assert@^1.4.0:
   dependencies:
     util "0.10.3"
 
-astw@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.npmjs.org/astw/-/astw-2.0.0.tgz#08121ac8288d35611c0ceec663f6cd545604897d"
+available-typed-arrays@^1.0.0, available-typed-arrays@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/available-typed-arrays/-/available-typed-arrays-1.0.2.tgz#6b098ca9d8039079ee3f77f7b783c4480ba513f5"
   dependencies:
-    acorn "^1.0.3"
+    array-filter "^1.0.0"
 
 backbone-metal@^0.6.2:
   version "0.6.2"
@@ -129,11 +145,11 @@ browser-pack@^6.0.1:
     through2 "^2.0.0"
     umd "^3.0.0"
 
-browser-resolve@^1.11.0, browser-resolve@^1.7.0:
-  version "1.11.2"
-  resolved "https://registry.npmjs.org/browser-resolve/-/browser-resolve-1.11.2.tgz#8ff09b0a2c421718a1051c260b32e48f442938ce"
+browser-resolve@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/browser-resolve/-/browser-resolve-2.0.0.tgz#99b7304cb392f8d73dba741bb2d7da28c6d7842b"
   dependencies:
-    resolve "1.1.7"
+    resolve "^1.17.0"
 
 browser-stdout@1.3.1:
   version "1.3.1"
@@ -190,48 +206,48 @@ browserify-zlib@~0.2.0:
   dependencies:
     pako "~1.0.5"
 
-browserify@^16.3.0:
-  version "16.3.0"
-  resolved "https://registry.yarnpkg.com/browserify/-/browserify-16.3.0.tgz#4d414466e0b07492fff493a009ea883a9f2db230"
+browserify@^17.0.0:
+  version "17.0.0"
+  resolved "https://registry.yarnpkg.com/browserify/-/browserify-17.0.0.tgz#4c48fed6c02bfa2b51fd3b670fddb805723cdc22"
   dependencies:
     JSONStream "^1.0.3"
     assert "^1.4.0"
     browser-pack "^6.0.1"
-    browser-resolve "^1.11.0"
+    browser-resolve "^2.0.0"
     browserify-zlib "~0.2.0"
-    buffer "^5.0.2"
+    buffer "~5.2.1"
     cached-path-relative "^1.0.0"
     concat-stream "^1.6.0"
     console-browserify "^1.1.0"
     constants-browserify "~1.0.0"
     crypto-browserify "^3.0.0"
     defined "^1.0.0"
-    deps-sort "^2.0.0"
+    deps-sort "^2.0.1"
     domain-browser "^1.2.0"
     duplexer2 "~0.1.2"
-    events "^2.0.0"
+    events "^3.0.0"
     glob "^7.1.0"
     has "^1.0.0"
     htmlescape "^1.1.0"
     https-browserify "^1.0.0"
     inherits "~2.0.1"
-    insert-module-globals "^7.0.0"
+    insert-module-globals "^7.2.1"
     labeled-stream-splicer "^2.0.0"
-    mkdirp "^0.5.0"
-    module-deps "^6.0.0"
+    mkdirp-classic "^0.5.2"
+    module-deps "^6.2.3"
     os-browserify "~0.3.0"
     parents "^1.0.1"
-    path-browserify "~0.0.0"
+    path-browserify "^1.0.0"
     process "~0.11.0"
     punycode "^1.3.2"
     querystring-es3 "~0.2.0"
     read-only-stream "^2.0.0"
     readable-stream "^2.0.2"
     resolve "^1.1.4"
-    shasum "^1.0.0"
+    shasum-object "^1.0.0"
     shell-quote "^1.6.1"
-    stream-browserify "^2.0.0"
-    stream-http "^2.0.0"
+    stream-browserify "^3.0.0"
+    stream-http "^3.0.0"
     string_decoder "^1.1.1"
     subarg "^1.0.0"
     syntax-error "^1.1.1"
@@ -239,7 +255,7 @@ browserify@^16.3.0:
     timers-browserify "^1.0.1"
     tty-browserify "0.0.1"
     url "~0.11.0"
-    util "~0.10.1"
+    util "~0.12.0"
     vm-browserify "^1.0.0"
     xtend "^4.0.0"
 
@@ -251,21 +267,28 @@ buffer-xor@^1.0.2:
   version "1.0.3"
   resolved "https://registry.npmjs.org/buffer-xor/-/buffer-xor-1.0.3.tgz#26e61ed1422fb70dd42e6e36729ed51d855fe8d9"
 
-buffer@^5.0.2:
-  version "5.0.6"
-  resolved "https://registry.npmjs.org/buffer/-/buffer-5.0.6.tgz#2ea669f7eec0b6eda05b08f8b5ff661b28573588"
+buffer@~5.2.1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/buffer/-/buffer-5.2.1.tgz#dd57fa0f109ac59c602479044dca7b8b3d0b71d6"
   dependencies:
     base64-js "^1.0.2"
     ieee754 "^1.1.4"
 
-builtin-status-codes@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.npmjs.org/builtin-status-codes/-/builtin-status-codes-2.0.0.tgz#6f22003baacf003ccd287afe6872151fddc58579"
+builtin-status-codes@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/builtin-status-codes/-/builtin-status-codes-3.0.0.tgz#85982878e21b98e1c66425e03d0174788f569ee8"
 
-cached-path-relative@^1.0.0:
+cached-path-relative@^1.0.0, cached-path-relative@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/cached-path-relative/-/cached-path-relative-1.0.2.tgz#a13df4196d26776220cc3356eb147a52dba2c6db"
 
+call-bind@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/call-bind/-/call-bind-1.0.0.tgz#24127054bb3f9bdcb4b1fb82418186072f77b8ce"
+  dependencies:
+    function-bind "^1.1.1"
+    get-intrinsic "^1.0.0"
+
 chalk@^2.0.0:
   version "2.4.2"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.2.tgz#cd42541677a54333cf541a49108c1432b44c9424"
@@ -290,6 +313,15 @@ color-name@1.1.3:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.3.tgz#a7d0558bd89c42f795dd42328f740831ca53bc25"
 
+combine-source-map@^0.8.0:
+  version "0.8.0"
+  resolved "https://registry.yarnpkg.com/combine-source-map/-/combine-source-map-0.8.0.tgz#a58d0df042c186fcf822a8e8015f5450d2d79a8b"
+  dependencies:
+    convert-source-map "~1.1.0"
+    inline-source-map "~0.6.0"
+    lodash.memoize "~3.0.3"
+    source-map "~0.5.3"
+
 combine-source-map@~0.7.1:
   version "0.7.2"
   resolved "https://registry.npmjs.org/combine-source-map/-/combine-source-map-0.7.2.tgz#0870312856b307a87cc4ac486f3a9a62aeccc09e"
@@ -307,7 +339,7 @@ concat-map@0.0.1:
   version "0.0.1"
   resolved "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
 
-concat-stream@^1.6.0, concat-stream@~1.6.0:
+concat-stream@^1.6.0, concat-stream@^1.6.1, concat-stream@~1.6.0:
   version "1.6.2"
   resolved "https://registry.yarnpkg.com/concat-stream/-/concat-stream-1.6.2.tgz#904bdf194cd3122fc675c77fc4ac3d4ff0fd1a34"
   dependencies:
@@ -316,14 +348,6 @@ concat-stream@^1.6.0, concat-stream@~1.6.0:
     readable-stream "^2.2.2"
     typedarray "^0.0.6"
 
-concat-stream@~1.5.1:
-  version "1.5.2"
-  resolved "https://registry.npmjs.org/concat-stream/-/concat-stream-1.5.2.tgz#708978624d856af41a5a741defdd261da752c266"
-  dependencies:
-    inherits "~2.0.1"
-    readable-stream "~2.0.0"
-    typedarray "~0.0.5"
-
 console-browserify@^1.1.0:
   version "1.1.0"
   resolved "https://registry.npmjs.org/console-browserify/-/console-browserify-1.1.0.tgz#f0241c45730a9fc6323b206dbf38edc741d0bb10"
@@ -380,6 +404,10 @@ crypto-browserify@^3.0.0:
     public-encrypt "^4.0.0"
     randombytes "^2.0.0"
 
+dash-ast@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/dash-ast/-/dash-ast-1.0.0.tgz#12029ba5fb2f8aa6f0a861795b23c1b4b6c27d37"
+
 date-now@^0.1.4:
   version "0.1.4"
   resolved "https://registry.npmjs.org/date-now/-/date-now-0.1.4.tgz#eaf439fd4d4848ad74e5cc7dbef200672b9e345b"
@@ -390,16 +418,22 @@ debug@3.1.0:
   dependencies:
     ms "2.0.0"
 
+define-properties@^1.1.3:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/define-properties/-/define-properties-1.1.3.tgz#cf88da6cbee26fe6db7094f61d870cbd84cee9f1"
+  dependencies:
+    object-keys "^1.0.12"
+
 defined@^1.0.0:
   version "1.0.0"
   resolved "https://registry.npmjs.org/defined/-/defined-1.0.0.tgz#c98d9bcef75674188e110969151199e39b1fa693"
 
-deps-sort@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.npmjs.org/deps-sort/-/deps-sort-2.0.0.tgz#091724902e84658260eb910748cccd1af6e21fb5"
+deps-sort@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/deps-sort/-/deps-sort-2.0.1.tgz#9dfdc876d2bcec3386b6829ac52162cda9fa208d"
   dependencies:
     JSONStream "^1.0.3"
-    shasum "^1.0.0"
+    shasum-object "^1.0.0"
     subarg "^1.0.0"
     through2 "^2.0.0"
 
@@ -410,11 +444,11 @@ des.js@^1.0.0:
     inherits "^2.0.1"
     minimalistic-assert "^1.0.0"
 
-detective@^5.0.2:
-  version "5.1.0"
-  resolved "https://registry.yarnpkg.com/detective/-/detective-5.1.0.tgz#7a20d89236d7b331ccea65832e7123b5551bb7cb"
+detective@^5.2.0:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/detective/-/detective-5.2.0.tgz#feb2a77e85b904ecdea459ad897cc90a99bd2a7b"
   dependencies:
-    acorn-node "^1.3.0"
+    acorn-node "^1.6.1"
     defined "^1.0.0"
     minimist "^1.1.1"
 
@@ -449,13 +483,54 @@ elliptic@^6.0.0:
     hash.js "^1.0.0"
     inherits "^2.0.1"
 
+es-abstract@^1.17.4, es-abstract@^1.17.5:
+  version "1.17.7"
+  resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.17.7.tgz#a4de61b2f66989fc7421676c1cb9787573ace54c"
+  dependencies:
+    es-to-primitive "^1.2.1"
+    function-bind "^1.1.1"
+    has "^1.0.3"
+    has-symbols "^1.0.1"
+    is-callable "^1.2.2"
+    is-regex "^1.1.1"
+    object-inspect "^1.8.0"
+    object-keys "^1.1.1"
+    object.assign "^4.1.1"
+    string.prototype.trimend "^1.0.1"
+    string.prototype.trimstart "^1.0.1"
+
+es-abstract@^1.18.0-next.1:
+  version "1.18.0-next.1"
+  resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.18.0-next.1.tgz#6e3a0a4bda717e5023ab3b8e90bec36108d22c68"
+  dependencies:
+    es-to-primitive "^1.2.1"
+    function-bind "^1.1.1"
+    has "^1.0.3"
+    has-symbols "^1.0.1"
+    is-callable "^1.2.2"
+    is-negative-zero "^2.0.0"
+    is-regex "^1.1.1"
+    object-inspect "^1.8.0"
+    object-keys "^1.1.1"
+    object.assign "^4.1.1"
+    string.prototype.trimend "^1.0.1"
+    string.prototype.trimstart "^1.0.1"
+
+es-to-primitive@^1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/es-to-primitive/-/es-to-primitive-1.2.1.tgz#e55cd4c9cdc188bcefb03b366c736323fc5c898a"
+  dependencies:
+    is-callable "^1.1.4"
+    is-date-object "^1.0.1"
+    is-symbol "^1.0.2"
+
 escape-string-regexp@1.0.5, escape-string-regexp@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
 
-events@^2.0.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/events/-/events-2.1.0.tgz#2a9a1e18e6106e0e812aa9ebd4a819b3c29c0ba5"
+events@^3.0.0:
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/events/-/events-3.2.0.tgz#93b87c18f8efcd4202a461aec4dfc0556b639379"
 
 evp_bytestokey@^1.0.0:
   version "1.0.0"
@@ -463,13 +538,33 @@ evp_bytestokey@^1.0.0:
   dependencies:
     create-hash "^1.1.1"
 
+fast-safe-stringify@^2.0.7:
+  version "2.0.7"
+  resolved "https://registry.yarnpkg.com/fast-safe-stringify/-/fast-safe-stringify-2.0.7.tgz#124aa885899261f68aedb42a7c080de9da608743"
+
+foreach@^2.0.5:
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/foreach/-/foreach-2.0.5.tgz#0bee005018aeb260d0a3af3ae658dd0136ec1b99"
+
 fs.realpath@^1.0.0:
   version "1.0.0"
   resolved "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
 
-function-bind@^1.0.2:
-  version "1.1.0"
-  resolved "https://registry.npmjs.org/function-bind/-/function-bind-1.1.0.tgz#16176714c801798e4e8f2cf7f7529467bb4a5771"
+function-bind@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.1.tgz#a56899d3ea3c9bab874bb9773b7c5ede92f4895d"
+
+get-assigned-identifiers@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/get-assigned-identifiers/-/get-assigned-identifiers-1.2.0.tgz#6dbf411de648cbaf8d9169ebb0d2d576191e2ff1"
+
+get-intrinsic@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/get-intrinsic/-/get-intrinsic-1.0.1.tgz#94a9768fcbdd0595a1c9273aacf4c89d075631be"
+  dependencies:
+    function-bind "^1.1.1"
+    has "^1.0.3"
+    has-symbols "^1.0.1"
 
 glob@7.1.2, glob@^7.1.0:
   version "7.1.2"
@@ -490,11 +585,15 @@ has-flag@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-3.0.0.tgz#b5d454dc2199ae225699f3467e5a07f3b955bafd"
 
-has@^1.0.0:
+has-symbols@^1.0.1:
   version "1.0.1"
-  resolved "https://registry.npmjs.org/has/-/has-1.0.1.tgz#8461733f538b0837c9361e39a9ab9e9704dc2f28"
+  resolved "https://registry.yarnpkg.com/has-symbols/-/has-symbols-1.0.1.tgz#9f5214758a44196c406d9bd76cebf81ec2dd31e8"
+
+has@^1.0.0, has@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/has/-/has-1.0.3.tgz#722d7cbfc1f6aa8241f16dd814e011e1f41e8796"
   dependencies:
-    function-bind "^1.0.2"
+    function-bind "^1.1.1"
 
 hash.js@^1.0.0:
   version "1.0.3"
@@ -525,9 +624,9 @@ inflight@^1.0.4:
     once "^1.3.0"
     wrappy "1"
 
-inherits@2, inherits@^2.0.1, inherits@^2.0.3, inherits@~2.0.1, inherits@~2.0.3:
-  version "2.0.3"
-  resolved "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
+inherits@2, inherits@^2.0.1, inherits@^2.0.3, inherits@^2.0.4, inherits@~2.0.1, inherits@~2.0.3, inherits@~2.0.4:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.4.tgz#0fa2c64f932917c3433a0ded55363aae37416b7c"
 
 inherits@2.0.1:
   version "2.0.1"
@@ -539,23 +638,72 @@ inline-source-map@~0.6.0:
   dependencies:
     source-map "~0.5.3"
 
-insert-module-globals@^7.0.0:
-  version "7.0.1"
-  resolved "https://registry.npmjs.org/insert-module-globals/-/insert-module-globals-7.0.1.tgz#c03bf4e01cb086d5b5e5ace8ad0afe7889d638c3"
+insert-module-globals@^7.2.1:
+  version "7.2.1"
+  resolved "https://registry.yarnpkg.com/insert-module-globals/-/insert-module-globals-7.2.1.tgz#d5e33185181a4e1f33b15f7bf100ee91890d5cb3"
   dependencies:
     JSONStream "^1.0.3"
-    combine-source-map "~0.7.1"
-    concat-stream "~1.5.1"
+    acorn-node "^1.5.2"
+    combine-source-map "^0.8.0"
+    concat-stream "^1.6.1"
     is-buffer "^1.1.0"
-    lexical-scope "^1.2.0"
+    path-is-absolute "^1.0.1"
     process "~0.11.0"
     through2 "^2.0.0"
+    undeclared-identifiers "^1.1.2"
     xtend "^4.0.0"
 
+is-arguments@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/is-arguments/-/is-arguments-1.0.4.tgz#3faf966c7cba0ff437fb31f6250082fcf0448cf3"
+
 is-buffer@^1.1.0:
   version "1.1.4"
   resolved "https://registry.npmjs.org/is-buffer/-/is-buffer-1.1.4.tgz#cfc86ccd5dc5a52fa80489111c6920c457e2d98b"
 
+is-callable@^1.1.4, is-callable@^1.2.2:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.2.2.tgz#c7c6715cd22d4ddb48d3e19970223aceabb080d9"
+
+is-core-module@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/is-core-module/-/is-core-module-2.0.0.tgz#58531b70aed1db7c0e8d4eb1a0a2d1ddd64bd12d"
+  dependencies:
+    has "^1.0.3"
+
+is-date-object@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/is-date-object/-/is-date-object-1.0.2.tgz#bda736f2cd8fd06d32844e7743bfa7494c3bfd7e"
+
+is-generator-function@^1.0.7:
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/is-generator-function/-/is-generator-function-1.0.7.tgz#d2132e529bb0000a7f80794d4bdf5cd5e5813522"
+
+is-negative-zero@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/is-negative-zero/-/is-negative-zero-2.0.0.tgz#9553b121b0fac28869da9ed459e20c7543788461"
+
+is-regex@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/is-regex/-/is-regex-1.1.1.tgz#c6f98aacc546f6cec5468a07b7b153ab564a57b9"
+  dependencies:
+    has-symbols "^1.0.1"
+
+is-symbol@^1.0.2:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/is-symbol/-/is-symbol-1.0.3.tgz#38e1014b9e6329be0de9d24a414fd7441ec61937"
+  dependencies:
+    has-symbols "^1.0.1"
+
+is-typed-array@^1.1.3:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/is-typed-array/-/is-typed-array-1.1.3.tgz#a4ff5a5e672e1a55f99c7f54e59597af5c1df04d"
+  dependencies:
+    available-typed-arrays "^1.0.0"
+    es-abstract "^1.17.4"
+    foreach "^2.0.5"
+    has-symbols "^1.0.1"
+
 isarray@~0.0.1:
   version "0.0.1"
   resolved "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz#8a18acfca9a8f4177e09abfc6038939b05d1eedf"
@@ -564,12 +712,6 @@ isarray@~1.0.0:
   version "1.0.0"
   resolved "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz#bb935d48582cba168c06834957a54a3e07124f11"
 
-json-stable-stringify@~0.0.0:
-  version "0.0.1"
-  resolved "https://registry.npmjs.org/json-stable-stringify/-/json-stable-stringify-0.0.1.tgz#611c23e814db375527df851193db59dd2af27f45"
-  dependencies:
-    jsonify "~0.0.0"
-
 jsonify@~0.0.0:
   version "0.0.0"
   resolved "https://registry.npmjs.org/jsonify/-/jsonify-0.0.0.tgz#2c74b6ee41d93ca51b7b5aaee8f503631d252a73"
@@ -590,12 +732,6 @@ labeled-stream-splicer@^2.0.0:
     isarray "~0.0.1"
     stream-splicer "^2.0.0"
 
-lexical-scope@^1.2.0:
-  version "1.2.0"
-  resolved "https://registry.npmjs.org/lexical-scope/-/lexical-scope-1.2.0.tgz#fcea5edc704a4b3a8796cdca419c3a0afaf22df4"
-  dependencies:
-    astw "^2.0.0"
-
 lodash.memoize@~3.0.3:
   version "3.0.4"
   resolved "https://registry.npmjs.org/lodash.memoize/-/lodash.memoize-3.0.4.tgz#2dcbd2c287cbc0a55cc42328bd0c736150d53e3f"
@@ -629,7 +765,11 @@ minimist@^1.1.0, minimist@^1.1.1:
   version "1.2.0"
   resolved "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
 
-mkdirp@0.5.1, mkdirp@^0.5.0:
+mkdirp-classic@^0.5.2:
+  version "0.5.3"
+  resolved "https://registry.yarnpkg.com/mkdirp-classic/-/mkdirp-classic-0.5.3.tgz#fa10c9115cc6d8865be221ba47ee9bed78601113"
+
+mkdirp@0.5.1:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
   dependencies:
@@ -651,16 +791,16 @@ mocha@^5.0.0:
     mkdirp "0.5.1"
     supports-color "5.4.0"
 
-module-deps@^6.0.0:
-  version "6.2.0"
-  resolved "https://registry.yarnpkg.com/module-deps/-/module-deps-6.2.0.tgz#d41a2e790245ce319171e4e7c4d8c73993ba3cd5"
+module-deps@^6.2.3:
+  version "6.2.3"
+  resolved "https://registry.yarnpkg.com/module-deps/-/module-deps-6.2.3.tgz#15490bc02af4b56cf62299c7c17cba32d71a96ee"
   dependencies:
     JSONStream "^1.0.3"
-    browser-resolve "^1.7.0"
-    cached-path-relative "^1.0.0"
+    browser-resolve "^2.0.0"
+    cached-path-relative "^1.0.2"
     concat-stream "~1.6.0"
     defined "^1.0.0"
-    detective "^5.0.2"
+    detective "^5.2.0"
     duplexer2 "^0.1.2"
     inherits "^2.0.1"
     parents "^1.0.0"
@@ -675,6 +815,23 @@ ms@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
 
+object-inspect@^1.8.0:
+  version "1.8.0"
+  resolved "https://registry.yarnpkg.com/object-inspect/-/object-inspect-1.8.0.tgz#df807e5ecf53a609cc6bfe93eac3cc7be5b3a9d0"
+
+object-keys@^1.0.12, object-keys@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/object-keys/-/object-keys-1.1.1.tgz#1c47f272df277f3b1daf061677d9c82e2322c60e"
+
+object.assign@^4.1.1:
+  version "4.1.2"
+  resolved "https://registry.yarnpkg.com/object.assign/-/object.assign-4.1.2.tgz#0ed54a342eceb37b38ff76eb831a0e788cb63940"
+  dependencies:
+    call-bind "^1.0.0"
+    define-properties "^1.1.3"
+    has-symbols "^1.0.1"
+    object-keys "^1.1.1"
+
 once@^1.3.0:
   version "1.4.0"
   resolved "https://registry.npmjs.org/once/-/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"
@@ -705,15 +862,15 @@ parse-asn1@^5.0.0:
     evp_bytestokey "^1.0.0"
     pbkdf2 "^3.0.3"
 
-path-browserify@~0.0.0:
-  version "0.0.0"
-  resolved "https://registry.npmjs.org/path-browserify/-/path-browserify-0.0.0.tgz#a0b870729aae214005b7d5032ec2cbbb0fb4451a"
+path-browserify@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/path-browserify/-/path-browserify-1.0.1.tgz#d98454a9c3753d5790860f16f68867b9e46be1fd"
 
-path-is-absolute@^1.0.0:
+path-is-absolute@^1.0.0, path-is-absolute@^1.0.1:
   version "1.0.1"
   resolved "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz#174b9268735534ffbc7ace6bf53a5a9e1b5c5f5f"
 
-path-parse@^1.0.5:
+path-parse@^1.0.6:
   version "1.0.6"
   resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.6.tgz#d62dbb5679405d72c4737ec58600e9ddcf06d24c"
 
@@ -731,10 +888,6 @@ platform@^1.3.3:
   version "1.3.3"
   resolved "https://registry.npmjs.org/platform/-/platform-1.3.3.tgz#646c77011899870b6a0903e75e997e8e51da7461"
 
-process-nextick-args@~1.0.6:
-  version "1.0.7"
-  resolved "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-1.0.7.tgz#150e20b756590ad3f91093f25a4f2ad8bff30ba3"
-
 process-nextick-args@~2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-2.0.0.tgz#a37d732f4271b4ab1ad070d35508e8290788ffaa"
@@ -779,7 +932,7 @@ read-only-stream@^2.0.0:
   dependencies:
     readable-stream "^2.0.2"
 
-readable-stream@^2.0.2, readable-stream@^2.1.0, readable-stream@^2.1.5, readable-stream@^2.2.2:
+readable-stream@^2.0.2, readable-stream@^2.1.5, readable-stream@^2.2.2:
   version "2.3.6"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.6.tgz#b11c27d88b8ff1fbe070643cf94b0c79ae1b0aaf"
   dependencies:
@@ -791,47 +944,44 @@ readable-stream@^2.0.2, readable-stream@^2.1.0, readable-stream@^2.1.5, readable
     string_decoder "~1.1.1"
     util-deprecate "~1.0.1"
 
-readable-stream@~2.0.0:
-  version "2.0.6"
-  resolved "https://registry.npmjs.org/readable-stream/-/readable-stream-2.0.6.tgz#8f90341e68a53ccc928788dacfcd11b36eb9b78e"
+readable-stream@^3.5.0, readable-stream@^3.6.0:
+  version "3.6.0"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-3.6.0.tgz#337bbda3adc0706bd3e024426a286d4b4b2c9198"
   dependencies:
-    core-util-is "~1.0.0"
-    inherits "~2.0.1"
-    isarray "~1.0.0"
-    process-nextick-args "~1.0.6"
-    string_decoder "~0.10.x"
-    util-deprecate "~1.0.1"
-
-resolve@1.1.7:
-  version "1.1.7"
-  resolved "https://registry.npmjs.org/resolve/-/resolve-1.1.7.tgz#203114d82ad2c5ed9e8e0411b3932875e889e97b"
+    inherits "^2.0.3"
+    string_decoder "^1.1.1"
+    util-deprecate "^1.0.1"
 
-resolve@^1.1.4, resolve@^1.4.0:
-  version "1.8.1"
-  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.8.1.tgz#82f1ec19a423ac1fbd080b0bab06ba36e84a7a26"
+resolve@^1.1.4, resolve@^1.17.0, resolve@^1.4.0:
+  version "1.18.1"
+  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.18.1.tgz#018fcb2c5b207d2a6424aee361c5a266da8f4130"
   dependencies:
-    path-parse "^1.0.5"
+    is-core-module "^2.0.0"
+    path-parse "^1.0.6"
 
 ripemd160@^1.0.0:
   version "1.0.1"
   resolved "https://registry.npmjs.org/ripemd160/-/ripemd160-1.0.1.tgz#93a4bbd4942bc574b69a8fa57c71de10ecca7d6e"
 
+safe-buffer@^5.1.2:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
+
 safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   version "5.1.2"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
 
-sha.js@^2.3.6, sha.js@~2.4.4:
+sha.js@^2.3.6:
   version "2.4.8"
   resolved "https://registry.npmjs.org/sha.js/-/sha.js-2.4.8.tgz#37068c2c476b6baf402d14a49c67f597921f634f"
   dependencies:
     inherits "^2.0.1"
 
-shasum@^1.0.0:
-  version "1.0.2"
-  resolved "https://registry.npmjs.org/shasum/-/shasum-1.0.2.tgz#e7012310d8f417f4deb5712150e5678b87ae565f"
+shasum-object@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/shasum-object/-/shasum-object-1.0.0.tgz#0b7b74ff5b66ecf9035475522fa05090ac47e29e"
   dependencies:
-    json-stable-stringify "~0.0.0"
-    sha.js "~2.4.4"
+    fast-safe-stringify "^2.0.7"
 
 shell-quote@^1.6.1:
   version "1.6.1"
@@ -842,16 +992,20 @@ shell-quote@^1.6.1:
     array-reduce "~0.0.0"
     jsonify "~0.0.0"
 
+simple-concat@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/simple-concat/-/simple-concat-1.0.1.tgz#f46976082ba35c2263f1c8ab5edfe26c41c9552f"
+
 source-map@~0.5.3:
   version "0.5.6"
   resolved "https://registry.npmjs.org/source-map/-/source-map-0.5.6.tgz#75ce38f52bf0733c5a7f0c118d81334a2bb5f412"
 
-stream-browserify@^2.0.0:
-  version "2.0.1"
-  resolved "https://registry.npmjs.org/stream-browserify/-/stream-browserify-2.0.1.tgz#66266ee5f9bdb9940a4e4514cafb43bb71e5c9db"
+stream-browserify@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/stream-browserify/-/stream-browserify-3.0.0.tgz#22b0a2850cdf6503e73085da1fc7b7d0c2122f2f"
   dependencies:
-    inherits "~2.0.1"
-    readable-stream "^2.0.2"
+    inherits "~2.0.4"
+    readable-stream "^3.5.0"
 
 stream-combiner2@^1.1.1:
   version "1.1.1"
@@ -860,15 +1014,14 @@ stream-combiner2@^1.1.1:
     duplexer2 "~0.1.0"
     readable-stream "^2.0.2"
 
-stream-http@^2.0.0:
-  version "2.5.0"
-  resolved "https://registry.npmjs.org/stream-http/-/stream-http-2.5.0.tgz#585eee513217ed98fe199817e7313b6f772a6802"
+stream-http@^3.0.0:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/stream-http/-/stream-http-3.1.1.tgz#0370a8017cf8d050b9a8554afe608f043eaff564"
   dependencies:
-    builtin-status-codes "^2.0.0"
-    inherits "^2.0.1"
-    readable-stream "^2.1.0"
-    to-arraybuffer "^1.0.0"
-    xtend "^4.0.0"
+    builtin-status-codes "^3.0.0"
+    inherits "^2.0.4"
+    readable-stream "^3.6.0"
+    xtend "^4.0.2"
 
 stream-splicer@^2.0.0:
   version "2.0.0"
@@ -877,16 +1030,26 @@ stream-splicer@^2.0.0:
     inherits "^2.0.1"
     readable-stream "^2.0.2"
 
+string.prototype.trimend@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/string.prototype.trimend/-/string.prototype.trimend-1.0.2.tgz#6ddd9a8796bc714b489a3ae22246a208f37bfa46"
+  dependencies:
+    define-properties "^1.1.3"
+    es-abstract "^1.18.0-next.1"
+
+string.prototype.trimstart@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/string.prototype.trimstart/-/string.prototype.trimstart-1.0.2.tgz#22d45da81015309cd0cdd79787e8919fc5c613e7"
+  dependencies:
+    define-properties "^1.1.3"
+    es-abstract "^1.18.0-next.1"
+
 string_decoder@^1.1.1, string_decoder@~1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.1.1.tgz#9cf1611ba62685d7030ae9e4ba34149c3af03fc8"
   dependencies:
     safe-buffer "~5.1.0"
 
-string_decoder@~0.10.x:
-  version "0.10.31"
-  resolved "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz#62e203bc41766c6c28c9fc84301dab1c5310fa94"
-
 subarg@^1.0.0:
   version "1.0.0"
   resolved "https://registry.npmjs.org/subarg/-/subarg-1.0.0.tgz#f62cf17581e996b48fc965699f54c06ae268b8d2"
@@ -928,10 +1091,6 @@ timers-browserify@^1.0.1:
   dependencies:
     process "~0.11.0"
 
-to-arraybuffer@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.npmjs.org/to-arraybuffer/-/to-arraybuffer-1.0.1.tgz#7d229b1fcc637e466ca081180836a7aabff83f43"
-
 traceur-runtime@0.0.59:
   version "0.0.59"
   resolved "https://registry.npmjs.org/traceur-runtime/-/traceur-runtime-0.0.59.tgz#666ccd4e0a50b53765f6938b3e9828e706f8e57b"
@@ -940,7 +1099,7 @@ tty-browserify@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/tty-browserify/-/tty-browserify-0.0.1.tgz#3f05251ee17904dfd0677546670db9651682b811"
 
-typedarray@^0.0.6, typedarray@~0.0.5:
+typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
@@ -952,6 +1111,16 @@ umd@^3.0.0:
   version "3.0.1"
   resolved "https://registry.npmjs.org/umd/-/umd-3.0.1.tgz#8ae556e11011f63c2596708a8837259f01b3d60e"
 
+undeclared-identifiers@^1.1.2:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/undeclared-identifiers/-/undeclared-identifiers-1.1.3.tgz#9254c1d37bdac0ac2b52de4b6722792d2a91e30f"
+  dependencies:
+    acorn-node "^1.3.0"
+    dash-ast "^1.0.0"
+    get-assigned-identifiers "^1.2.0"
+    simple-concat "^1.0.0"
+    xtend "^4.0.1"
+
 underscore@>=1.8.3, underscore@^1.4.4:
   version "1.8.3"
   resolved "https://registry.npmjs.org/underscore/-/underscore-1.8.3.tgz#4f3fb53b106e6097fcf9cb4109f2a5e9bdfa5022"
@@ -963,24 +1132,46 @@ url@~0.11.0:
     punycode "1.3.2"
     querystring "0.2.0"
 
-util-deprecate@~1.0.1:
+util-deprecate@^1.0.1, util-deprecate@~1.0.1:
   version "1.0.2"
   resolved "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
 
-util@0.10.3, util@~0.10.1:
+util@0.10.3:
   version "0.10.3"
   resolved "https://registry.npmjs.org/util/-/util-0.10.3.tgz#7afb1afe50805246489e3db7fe0ed379336ac0f9"
   dependencies:
     inherits "2.0.1"
 
+util@~0.12.0:
+  version "0.12.3"
+  resolved "https://registry.yarnpkg.com/util/-/util-0.12.3.tgz#971bb0292d2cc0c892dab7c6a5d37c2bec707888"
+  dependencies:
+    inherits "^2.0.3"
+    is-arguments "^1.0.4"
+    is-generator-function "^1.0.7"
+    is-typed-array "^1.1.3"
+    safe-buffer "^5.1.2"
+    which-typed-array "^1.1.2"
+
 vm-browserify@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/vm-browserify/-/vm-browserify-1.1.0.tgz#bd76d6a23323e2ca8ffa12028dc04559c75f9019"
 
+which-typed-array@^1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/which-typed-array/-/which-typed-array-1.1.2.tgz#e5f98e56bda93e3dac196b01d47c1156679c00b2"
+  dependencies:
+    available-typed-arrays "^1.0.2"
+    es-abstract "^1.17.5"
+    foreach "^2.0.5"
+    function-bind "^1.1.1"
+    has-symbols "^1.0.1"
+    is-typed-array "^1.1.3"
+
 wrappy@1:
   version "1.0.2"
   resolved "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
 
-xtend@^4.0.0, xtend@^4.0.1, xtend@~4.0.1:
-  version "4.0.1"
-  resolved "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz#a5c6d532be656e23db820efb943a1f04998d63af"
+xtend@^4.0.0, xtend@^4.0.1, xtend@^4.0.2, xtend@~4.0.1:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.2.tgz#bb72779f5fa465186b1f438f674fa347fdb5db54"