build: update rollup to version 2.28.1

Author: renovate-bot

package.json

@@ -197,7 +197,7 @@
     "regenerator-runtime": "0.13.7",
     "resolve-url-loader": "3.1.1",
     "rimraf": "3.0.2",
-    "rollup": "2.27.1",
+    "rollup": "2.28.1",
     "rxjs": "6.6.3",
     "sass": "1.26.11",
     "sass-loader": "10.0.2",

packages/angular_devkit/build_angular/package.json

@@ -54,7 +54,7 @@
     "regenerator-runtime": "0.13.7",
     "resolve-url-loader": "3.1.1",
     "rimraf": "3.0.2",
-    "rollup": "2.27.1",
+    "rollup": "2.28.1",
     "rxjs": "6.6.3",
     "sass": "1.26.11",
     "sass-loader": "10.0.2",

yarn.lock

@@ -10297,10 +10297,10 @@ rollup-plugin-sourcemaps@^0.6.0:
     "@rollup/pluginutils" "^3.0.9"
     source-map-resolve "^0.6.0"
 
-rollup@2.27.1:
-  version "2.27.1"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.27.1.tgz#372744e1d36eba0fd942d997600c2fc2ca266305"
-  integrity sha512-GiWHQvnmMgBktSpY/1+nrGpwPsTw4b9P28og2uedfeq4JZ16rzAmnQ5Pm/E0/BEmDNia1ZbY7+qu3nBgNa19Hg==
+rollup@2.28.1:
+  version "2.28.1"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.28.1.tgz#ceedca3cdb013c2fa8f22f958a29c203368159ea"
+  integrity sha512-DOtVoqOZt3+FjPJWLU8hDIvBjUylc9s6IZvy76XklxzcLvAQLtVAG/bbhsMhcWnYxC0TKKcf1QQ/tg29zeID0Q==
   optionalDependencies:
     fsevents "~2.1.2"