build: update terser to version 4.6.4

Author: renovate-bot

packages/angular_devkit/build_angular/package.json

@@ -58,7 +58,7 @@
     "stylus": "0.54.7",
     "stylus-loader": "3.0.2",
     "tree-kill": "1.2.2",
-    "terser": "4.6.3",
+    "terser": "4.6.4",
     "terser-webpack-plugin": "2.3.5",
     "webpack": "4.41.6",
     "webpack-dev-middleware": "3.7.2",

yarn.lock

@@ -11154,7 +11154,16 @@ terser-webpack-plugin@^1.4.3:
     webpack-sources "^1.4.0"
     worker-farm "^1.7.0"
 
-terser@4.6.3, terser@^4.1.2, terser@^4.3.8, terser@^4.4.3:
+terser@4.6.4:
+  version "4.6.4"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-4.6.4.tgz#40a0b37afbe5b57e494536815efa68326840fc00"
+  integrity sha512-5fqgBPLgVHZ/fVvqRhhUp9YUiGXhFJ9ZkrZWD9vQtFBR4QIGTnbsb+/kKqSqfgp3WnBwGWAFnedGTtmX1YTn0w==
+  dependencies:
+    commander "^2.20.0"
+    source-map "~0.6.1"
+    source-map-support "~0.5.12"
+
+terser@^4.1.2, terser@^4.3.8, terser@^4.4.3:
   version "4.6.3"
   resolved "https://registry.yarnpkg.com/terser/-/terser-4.6.3.tgz#e33aa42461ced5238d352d2df2a67f21921f8d87"
   integrity sha512-Lw+ieAXmY69d09IIc/yqeBqXpEQIpDGZqT34ui1QWXIUpR2RjbqEkT8X7Lgex19hslSqcWM5iMN2kM11eMsESQ==