gh-actions: apply workaround for codecov/codecov-action#85

Author: miri64

.github/workflows/tox.yml

@@ -31,6 +31,10 @@ jobs:
     - name: Test with tox
       run: tox
     - name: Upload to coverage
-      uses: codecov/[email protected]
-      with:
-        flags: ${{ matrix.python-version }}
+      # workaround for https://github.com/codecov/codecov-action/issues/85
+      if: >-
+        matrix.python-version == 3.8 && success()
+      run: |
+        GITHUB_ACTION= bash <(curl -s https://codecov.io/bash) -X search -f "./coverage.xml"
+      env:
+        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}