Bump codecov/codecov-action from v1.0.12 to v1.0.13

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] <[email protected]>

Author: dependabot[bot]

.github/workflows/main.yml

@@ -49,7 +49,7 @@ jobs:
         if: matrix.php-versions == '7.4' && matrix.dependencies == 'highest'
 
       - name: Upload coverage to Codecov
-        uses: codecov/[email protected].12
+        uses: codecov/[email protected].13
         if: matrix.php-versions == '7.4' && matrix.dependencies == 'highest'
 
   phpcs: