build(deps): bump coverallsapp/github-action from 1.2.4 to 2.0.0

Bumps [coverallsapp/github-action](https://github.com/coverallsapp/github-action) from 1.2.4 to 2.0.0.
- [Release notes](https://github.com/coverallsapp/github-action/releases)
- [Commits](coverallsapp/github-action@v1.2.4...v2.0.0)

---
updated-dependencies:
- dependency-name: coverallsapp/github-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/build-and-test.yml

@@ -24,7 +24,7 @@ jobs:
         npm run lint
         npm run test -- -- --coverage
     - name: Coveralls GitHub Action
-      uses: coverallsapp/github-action@v1.2.4
+      uses: coverallsapp/github-action@v2.0.0
       with:
         github-token: ${{ secrets.GITHUB_TOKEN }}
         path-to-lcov: ./packages/purgecss/coverage/lcov.info