build(deps-dev): bump rollup from 2.19.0 to 2.21.0

Bumps [rollup](https://github.com/rollup/rollup) from 2.19.0 to 2.21.0.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v2.19.0...v2.21.0)

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

Author: dependabot-preview[bot]

yarn.lock

@@ -4123,9 +4123,9 @@ rollup-pluginutils@^2.8.1:
     estree-walker "^0.6.1"
 
 rollup@^2.10.9:
-  version "2.19.0"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.19.0.tgz#6484868882281552b0dc33aa5bc5b36a9c920452"
-  integrity sha512-nny5Vs4jwY3vbQAXgOyU4ZDZqLvMKm/umnsVry/demVL6ve8ke1XhdpYE0eiWencASmx/qFPw6pP8P7MLJl9XA==
+  version "2.21.0"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.21.0.tgz#d2e114533812043d5c9b7b0a83f1b2a242e4e1d6"
+  integrity sha512-BEGgy+wSzux7Ycq58pRiWEOBZaXRXTuvzl1gsm7gqmsAHxkWf9nyA5V2LN9fGSHhhDQd0/C13iRzSh4bbIpWZQ==
   optionalDependencies:
     fsevents "~2.1.2"