Bump rollup from 2.7.6 to 2.9.1

Bumps [rollup](https://github.com/rollup/rollup) from 2.7.6 to 2.9.1.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rollup/rollup/compare/v2.7.6...v2.9.1)

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

package-lock.json

@@ -10214,9 +10214,9 @@
       }
     },
     "rollup": {
-      "version": "2.7.6",
-      "resolved": "https://registry.npmjs.org/rollup/-/rollup-2.7.6.tgz",
-      "integrity": "sha512-AdHosxHBKyBsdtbT1/AqbWNQ87O4SSxS4N9iMwEpoCDAT6e4Du3uJSy83mp3ckgmCxly5VeXGx0WHsm21Djytg==",
+      "version": "2.9.1",
+      "resolved": "https://registry.npmjs.org/rollup/-/rollup-2.9.1.tgz",
+      "integrity": "sha512-kEZn76R0j+WD4AActu5Np4RShNlewTtJhdUaWNtHwHnAA8AOapyXgH6O7NL2RkcQLHnl49oz1xW1VrDcu5yP+Q==",
       "dev": true,
       "requires": {
         "fsevents": "~2.1.2"