build(deps-dev): bump rollup from 2.26.5 to 2.26.8 (#569)

Bumps [rollup](https://github.com/rollup/rollup) from 2.26.5 to 2.26.8.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v2.26.5...v2.26.8)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

yarn.lock

@@ -4040,9 +4040,9 @@ rollup-plugin-typescript2@^0.27.0:
     tslib "2.0.1"
 
 rollup@^2.2.0:
-  version "2.26.5"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.26.5.tgz#5562ec36fcba3eed65cfd630bd78e037ad0e0307"
-  integrity sha512-rCyFG3ZtQdnn9YwfuAVH0l/Om34BdO5lwCA0W6Hq+bNB21dVEBbCRxhaHOmu1G7OBFDWytbzAC104u7rxHwGjA==
+  version "2.26.8"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.26.8.tgz#7b02353835a73c4797f42177a5fa3fc074012713"
+  integrity sha512-li9WaJYc5z9WzV1jhZbPQCrsOpGNsI+Li1qyrn5n745ZNSnlkRlBtj1Hs+Z0Dc2N1+P7HT34UKAEASqN9Th8cg==
   optionalDependencies:
     fsevents "~2.1.2"