build(deps): bump rollup from 2.9.0 to 2.9.1

Bumps [rollup](https://github.com/rollup/rollup) from 2.9.0 to 2.9.1.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v2.9.0...v2.9.1)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package.json

@@ -29,7 +29,7 @@
     "onchange": "^7.0.2",
     "prettier": "2.0.5",
     "pretty-quick": "^2.0.1",
-    "rollup": "^2.9.0",
+    "rollup": "^2.9.1",
     "rollup-plugin-babel": "^4.3.2",
     "rollup-plugin-commonjs": "^10.1.0",
     "rollup-plugin-node-resolve": "^5.2.0",

yarn.lock

@@ -4920,10 +4920,10 @@ rollup-pluginutils@^2.6.0, rollup-pluginutils@^2.8.1, rollup-pluginutils@^2.8.2:
   dependencies:
     estree-walker "^0.6.1"
 
-rollup@^2.9.0:
-  version "2.9.0"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.9.0.tgz#6b09bf82b68351417269b333e4bb2624ebd1e148"
-  integrity sha512-a3fLsmHUbO2OCE/Qp1aM8PtqnCWHysc9QfYs4PIGbUDraeNMH1v0uT7nqQeDB3IfDjNNLl8H2Z7UKs0q1SbK1g==
+rollup@^2.9.1:
+  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"