Try without base-path

.github/workflows/build.yml

@@ -57,7 +57,6 @@ jobs:
     - name: Push coverage to Coveralls.io
       uses: coverallsapp/github-action@master
       with:
-        base-path: src
         path-to-lcov: target/coverage/lcov.info
         github-token: ${{ secrets.GITHUB_TOKEN }}