Merge pull request #102 from sfinkens/update-codecov

Update codecov uploader

Author: sfinkens

.github/workflows/ci.yaml

@@ -42,7 +42,7 @@ jobs:
           pytest --cov=pygac pygac/tests --cov-report=xml
 
       - name: Upload unittest coverage
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@v2
         with:
           file: ./coverage.xml
           env_vars: OS,PYTHON_VERSION