Merge pull request #783 from ui-router/dependabot/npm_and_yarn/rollup-2.9.1

Author: dependabot-preview[bot]

yarn.lock

@@ -5450,9 +5450,9 @@ rollup@^1.12.1:
     acorn "^7.1.0"
 
 rollup@^2.0.6:
-  version "2.7.6"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.7.6.tgz#8e6682e64ca65eb33b896dcce902696f0415ce1a"
-  integrity sha512-AdHosxHBKyBsdtbT1/AqbWNQ87O4SSxS4N9iMwEpoCDAT6e4Du3uJSy83mp3ckgmCxly5VeXGx0WHsm21Djytg==
+  version "2.9.1"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.9.1.tgz#3038ba1378e2ee614b5c9385b8379d7bec4c69ea"
+  integrity sha512-kEZn76R0j+WD4AActu5Np4RShNlewTtJhdUaWNtHwHnAA8AOapyXgH6O7NL2RkcQLHnl49oz1xW1VrDcu5yP+Q==
   optionalDependencies:
     fsevents "~2.1.2"