Add tests coverage job

.github/workflows/tests.yml

@@ -3,7 +3,8 @@ name: Tests
 on: push
 
 jobs:
-  test-py39:
+
+  test-with-versions:
     name: Run tests
     runs-on: ubuntu-latest
     strategy:
@@ -17,4 +18,22 @@ jobs:
       - run: pip install tox
       - run: tox
         env:
-          TOXENV: ${{ matrix.python-version }}
+          TOXENV: ${{ matrix.python-version }}
+
+  test-coverage:
+    name: Run tests with coverage and report results to Coveralls.io
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+      - run: |
+          pip install tox
+          pip install cython
+          make cythonize
+      - run: tox
+        env:
+          TOXENV: coveralls
+          DEPENDENCY_INJECTOR_DEBUG_MODE: 1
+          COVERALLS_REPO_TOKEN: ${{ COVERALLS_REPO_TOKEN }}