ci (nodejs) : use npm instead of yarn for tests

Author: firestar300

.github/workflows/node.js.yml

@@ -24,5 +24,5 @@ jobs:
       uses: actions/setup-node@v1
       with:
         node-version: ${{ matrix.node-version }}
-    - run: yarn install --frozen-lockfile
-    - run: yarn run build --if-present
+    - run: npm install --frozen-lockfile
+    - run: npm run build --if-present