[ci] Minor updates for CI

.coveragerc

@@ -1,10 +1,8 @@
 [run]
+source = openwisp_utils
+parallel = true
+concurrency = multiprocessing
 omit =
     /*/test*
-    /tests
     /*/__init__.py
-    /setup.py
     /*/migrations/*
-source = openwisp_utils
-parallel = true
-concurrency = multiprocessing

.github/workflows/ci.yml

@@ -12,7 +12,6 @@ on:
       - dev
 
 jobs:
-
   build:
     name: Python==${{ matrix.python-version }} | ${{ matrix.django-version }}
     runs-on: ubuntu-24.04
@@ -54,30 +53,26 @@ jobs:
     - name: Tests
       if: ${{ !cancelled() && steps.deps.conclusion == 'success' }}
       run: |
-        coverage run -p --source=openwisp_utils runtests.py --parallel
+        coverage run runtests.py --parallel
         coverage combine
         coverage xml
       env:
         SELENIUM_HEADLESS: 1
 
     - name: Upload Coverage
       if: ${{ success() }}
-      run: coveralls --service=github
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        COVERALLS_FLAG_NAME: |
-          python-${{ matrix.python-version }}-${{ matrix.django-version }}
-        COVERALLS_PARALLEL: true
+      uses: coverallsapp/github-action@v2
+      with:
+        parallel: true
+        format: cobertura
+        flag-name: python-${{ matrix.env.env }}
+        github-token: ${{ secrets.GITHUB_TOKEN }}
 
   coveralls:
-    name: Finish Coveralls
     needs: build
     runs-on: ubuntu-latest
-    container: python:3-slim
     steps:
-      - name: Finished
-        run: |
-          pip3 install --upgrade coveralls
-          coveralls --finish
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Coveralls Finished
+        uses: coverallsapp/github-action@v2
+        with:
+          parallel-finished: true