Update codecov/codecov-action action to v2

Author: renovate-bot

.github/workflows/test.yml

@@ -76,7 +76,7 @@ jobs:
           coverage-reports: coverage.xml
 
       - name: "Upload coverage to Codecov"
-        uses: codecov/codecov-action@v1.5.2
+        uses: codecov/codecov-action@v2.0.1
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           fail_ci_if_error: true