Setup codecov.io to measure test coverage #696 (#739)

.github/workflows/cd.yml

@@ -37,4 +37,4 @@ jobs:
 
       - name: Publish distribution 📦 to PyPI
         if: startsWith(github.ref, 'refs/tags')
-        uses: pypa/gh-action-pypi-publish@release/v1
+        uses: pypa/gh-action-pypi-publish@release/v1

.github/workflows/ci.yml

@@ -26,3 +26,12 @@ jobs:
         run: make ci_lint
       - name: Test with pytest
         run: make ci_test
+      - name: Generate coverage report
+        run: make coverage
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v3
+        with:
+          file: coverage.xml
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+