[CI] Fix broken Coveralls step

Author: giordano

.github/workflows/ci.yml

@@ -42,7 +42,9 @@ jobs:
           depwarn: error
       - uses: julia-actions/julia-processcoverage@v1
       - name: Coveralls
-        uses: coverallsapp/github-action@v1.1.2
+        uses: coverallsapp/github-action@v2
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
-          path-to-lcov: lcov.info
+          path-to-lcov: lcov.info
+          flag-name: run-${{ join(matrix.*, '-') }}
+          parallel: true