Merge pull request #223 from rajulkumar/fix_codecov

Update codecov-action to v4 for tokenless uploads from forked repos

Author: rajulkumar

.github/workflows/tox-test.yml

@@ -58,7 +58,7 @@ jobs:
       - name: Install pytest cov
         run: pip install pytest-cov
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v2
+        uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           fail_ci_if_error: true