action: proxy registry url

Author: rynz

.github/workflows/nodejs.yml

@@ -13,6 +13,7 @@ jobs:
       - uses: actions/setup-node@v1
         with:
           node-version: 12
+          registry-url: https://npm.pkg.github.com/
       - run: npm ci
       - run: npm run build --if-present
       - run: npm test