Bump codecov/codecov-action from v1.0.14 to v1.0.15

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from v1.0.14 to v1.0.15.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Commits](https://github.com/codecov/codecov-action/compare/v1.0.14...239febf655bba88b16ff5dea1d3135ea8663a1f9)

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

.github/workflows/test.yml

@@ -39,7 +39,7 @@ jobs:
         run: yarn run test
       -
         name: Upload coverage
-        uses: codecov/codecov-action@v1.0.14
+        uses: codecov/codecov-action@v1.0.15
         if: success()
         with:
           token: ${{ secrets.CODECOV_TOKEN }}