ci(tests): Update codecov ci action

Author: tony

.github/workflows/tests.yml

@@ -35,6 +35,6 @@ jobs:
       - name: Test with pytest
         run: poetry run py.test --cov=./ --cov-report=xml
 
-      - uses: codecov/codecov-action@v1
+      - uses: codecov/codecov-action@v2
         with:
           token: ${{ secrets.CODECOV_TOKEN }}