Bump codecov/codecov-action from 2.1.0 to 3.0.0

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 2.1.0 to 3.0.0.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-action@v2.1.0...v3.0.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/ci.yml

@@ -53,7 +53,7 @@ jobs:
       run: |
         poetry run pytest -n auto --dist loadscope --junit-xml=junit/test-results.xml --cov --cov-report=xml --cov-report=html
     - name: Update Codecov coverage report
-      uses: codecov/codecov-action@v2.1.0
+      uses: codecov/codecov-action@v3.0.0
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         flags: ${{ matrix.os }}-py${{ matrix.python-version }}