Bump rollup from 1.30.1 to 1.31.1 (#12)

Bumps [rollup](https://github.com/rollup/rollup) from 1.30.1 to 1.31.1.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v1.30.1...v1.31.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

yarn.lock

@@ -3817,9 +3817,9 @@ rollup-pluginutils@2.8.2, rollup-pluginutils@^2.8.1:
     estree-walker "^0.6.1"
 
 rollup@^1.30.1:
-  version "1.30.1"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-1.30.1.tgz#3fd28d6198beb2f3cd1640732047d5ec16c2d3a0"
-  integrity sha512-Uus8mwQXwaO+ZVoNwBcXKhT0AvycFCBW/W8VZtkpVGsotRllWk9oldfCjqWmTnFRI0y7x6BnEqSqc65N+/YdBw==
+  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" "*"