build: update rollup to version 2.7.6

Author: renovate-bot

packages/angular_devkit/build_angular/package.json

@@ -49,7 +49,7 @@
     "regenerator-runtime": "0.13.5",
     "resolve-url-loader": "3.1.1",
     "rimraf": "3.0.2",
-    "rollup": "2.7.3",
+    "rollup": "2.7.6",
     "rxjs": "6.5.5",
     "sass": "1.26.5",
     "sass-loader": "8.0.2",

yarn.lock

@@ -10536,10 +10536,10 @@ [email protected]:
   optionalDependencies:
     fsevents "~2.1.2"
 
-[email protected].3:
-  version "2.7.3"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.7.3.tgz#24ebb08533b9ca6bc5a7aef8100e155e50035c31"
-  integrity sha512-lAWJGZ5BQzcu/5fhMKGJrh5oy9LQUoaCid8cQV8k+E2vE9E/UWptzcM+bSBg+u8akORsvnybsqQUE/wVChIazg==
+[email protected].6:
+  version "2.7.6"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.7.6.tgz#8e6682e64ca65eb33b896dcce902696f0415ce1a"
+  integrity sha512-AdHosxHBKyBsdtbT1/AqbWNQ87O4SSxS4N9iMwEpoCDAT6e4Du3uJSy83mp3ckgmCxly5VeXGx0WHsm21Djytg==
   optionalDependencies:
     fsevents "~2.1.2"