Use recommended Coveralls GitHub action in CI

.github/workflows/ci.yml

@@ -8,8 +8,7 @@ jobs:
     - name: Prepare
       run: |
         sudo apt update -qq
-        sudo apt install -qq check
-        pip install cpp-coveralls
+        sudo apt install -qq check lcov
     - uses: actions/checkout@v2
     - name: Build
       run: |
@@ -20,9 +19,14 @@ jobs:
       run: sudo make install
     - name: Run tests
       run: make check
+    - name: Collect coverage
+      run: lcov --capture -d '.' --exclude '/usr*' -o coverage.info
     - name: Upload coverage
       if: github.repository == 'c9s/r3'
-      run: coveralls --exclude php
+      uses: coverallsapp/github-action@1.1.3
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        path-to-lcov: coverage.info
 
   cmake:
     runs-on: ubuntu-latest