Bump codecov/codecov-action from 1.3.2 to 2.0.2

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 1.3.2 to 2.0.2.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-action@v1.3.2...v2.0.2)

---
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>

Author: dependabot[bot]

.github/workflows/coverage.yml

@@ -28,7 +28,7 @@ jobs:
           coverage run --rcfile=.coveragerc -m pytest test/unit/test_dropbox_unit.py
           coverage xml
       - name: Publish Coverage
-        uses: codecov/codecov-action@v1.3.2
+        uses: codecov/codecov-action@v2.0.2
         with:
           flags: unit
           fail_ci_if_error: true