swapping to yarn for actions

Author: stoopidJSON

.github/workflows/node.js.yml

@@ -25,6 +25,5 @@ jobs:
       uses: actions/setup-node@v1
       with:
         node-version: ${{ matrix.node-version }}
-    - run: npm ci
-    - run: npm run build --if-present
-    - run: npm test
+    - run: npm i -g yarn
+    - run: yarn test