Bump codecov/codecov-action from 1 to 2.1.0

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 1 to 2.1.0.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-action@v1...v2.1.0)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/pytest.yml

@@ -73,7 +73,7 @@ jobs:
 
       - name: codecov.io
         if: matrix.py == '3.8'
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@v2.1.0
 
   compat:
     name: pytest