fix codecov

.github/workflows/codecov.yaml

@@ -12,5 +12,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 18
+      - run: npm ci
+      - name: Generate coverage reports
+        run: npx nyc --reporter=lcov npm test
       - name: Upload coverage reports to Codecov
         uses: codecov/codecov-action@v3