chore(deps-dev): bump rollup from 2.54.0 to 2.56.2 (#896)

Bumps [rollup](https://github.com/rollup/rollup) from 2.54.0 to 2.56.2.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v2.54.0...v2.56.2)

---
updated-dependencies:
- dependency-name: rollup
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -70,7 +70,7 @@
     "jasmine-core": "3.8.0",
     "prettier": "2.3.2",
     "rimraf": "3.0.2",
-    "rollup": "2.54.0",
+    "rollup": "2.56.2",
     "rollup-plugin-prettier": "2.1.0",
     "rollup-plugin-strip-banner": "2.0.0",
     "tmp": "0.2.1",