chore(deps): bump codecov/codecov-action from v1.0.12 to v1.0.13 (#99)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from v1.0.12 to v1.0.13.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Commits](codecov/codecov-action@v1.0.12...6004246)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/rust.yml

@@ -44,7 +44,7 @@ jobs:
           args: '-- --test-threads 1'
 
       - name: Upload to codecov.io
-        uses: codecov/codecov-action@v1.0.12
+        uses: codecov/codecov-action@v1.0.13
         with:
           token: ${{secrets.CODECOV_TOKEN}}
           flags: unit