Update dependency rollup to v2.18.1

Author: renovate-bot

package.json

@@ -97,7 +97,7 @@
     "postcss-modules": "3.1.0",
     "prettier": "2.0.5",
     "rimraf": "3.0.2",
-    "rollup": "2.18.0",
+    "rollup": "2.18.1",
     "rollup-plugin-babel": "4.4.0",
     "rollup-plugin-commonjs": "10.1.0",
     "rollup-plugin-copy-assets": "2.0.1",

yarn.lock

@@ -13928,10 +13928,10 @@ rollup-pluginutils@^2.5.0, rollup-pluginutils@^2.6.0, rollup-pluginutils@^2.8.1,
   dependencies:
     estree-walker "^0.6.1"
 
-rollup@2.18.0:
-  version "2.18.0"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.18.0.tgz#f03801e5dd01415e5675dcf61c824ea493ca0392"
-  integrity sha512-LhuQQp3WpnHo3HlKCRrdMXpB6jdLsGOoXXSfMjbv74s5VdV3WZhkYJT0Z6w/EH3UgPH+g/S9T4GJrKW/5iD8TA==
+rollup@2.18.1:
+  version "2.18.1"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.18.1.tgz#1662c679da5dfc89ec6fda75951a2bcca1a4f77d"
+  integrity sha512-w4X77ADA+WTGlapC8Z6yggdJtODw3SBl6R2LSkA7ZW5MtdkgcB7sfaSD1UWyx8diXbMcGIb0eI9gCx/dyqOgNQ==
   optionalDependencies:
     fsevents "~2.1.2"