build: update rollup to version 1.31.1

Author: renovate-bot

packages/angular_devkit/build_angular/package.json

@@ -46,7 +46,7 @@
     "raw-loader": "4.0.0",
     "regenerator-runtime": "0.13.3",
     "rimraf": "3.0.2",
-    "rollup": "1.31.0",
+    "rollup": "1.31.1",
     "rxjs": "6.5.4",
     "sass": "1.25.0",
     "sass-loader": "8.0.2",

yarn.lock

@@ -9758,6 +9758,15 @@ rollup@1.31.0:
     "@types/node" "*"
     acorn "^7.1.0"
 
+rollup@1.31.1:
+  version "1.31.1"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-1.31.1.tgz#4170d6f87148d46e5fbe29b493f8f3ea3453c96f"
+  integrity sha512-2JREN1YdrS/kpPzEd33ZjtuNbOuBC3ePfuZBdKEybvqcEcszW1ckyVqzcEiEe0nE8sqHK+pbJg+PsAgRJ8+1dg==
+  dependencies:
+    "@types/estree" "*"
+    "@types/node" "*"
+    acorn "^7.1.0"
+
 run-async@^2.2.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/run-async/-/run-async-2.3.0.tgz#0371ab4ae0bdd720d4166d7dfda64ff7a445a6c0"