ci: add Codecov upload step to GitHub Actions workflow

Author: manu4543

.github/workflows/nodejs.yml

@@ -26,6 +26,7 @@ jobs:
         npm install
         npm run build
         npm run test
-        npm run report-coverage
       env:
         CI: true
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v3