Refactor github actions for coveralls

Author: Gagaro

.github/workflows/python-app.yml

@@ -44,7 +44,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install -e .
-        pip install -U flake8 coveralls argparse
+        pip install -U flake8 coverage argparse
         pip install -U Django~=${{ matrix.django_version }}
     - name: Lint with flake8
       run: |
@@ -54,7 +54,19 @@ jobs:
       run: |
         python -W error::DeprecationWarning -W error::PendingDeprecationWarning \
           -m coverage run `which django-admin` test --settings=safedelete.tests.settings
-    - name: Coverage
-      if: ${{ success() }}
-      run: |
-        coveralls --service=github
+    - name: Coveralls Parallel
+      uses: coverallsapp/github-action@master
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        flag-name: run-${{ matrix.python_version }}-${{ matrix.django_version }}
+        parallel: true
+
+  finish:
+    needs: tests_python
+    runs-on: ubuntu-latest
+    steps:
+    - name: Coveralls Finished
+      uses: coverallsapp/github-action@master
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        parallel-finished: true