chore: Add Coveralls to CI

Author: juancarlospaco

.github/workflows/ci.yml

@@ -36,6 +36,7 @@ jobs:
         uses: coverallsapp/github-action@master
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
+          path-to-lcov: ./lcov.info
 
   release-please:
     needs: test