Update codecov/codecov-action action to v2 (#2779)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

.github/workflows/test.yml

@@ -53,4 +53,4 @@ jobs:
       - run: npm run coverage
         env:
           NODE_OPTIONS: --max_old_space_size=4096
-      - uses: codecov/codecov-action@v1
+      - uses: codecov/codecov-action@v2