Update node.js.yml - don't require yarn.lock

Author: dsiu

.github/workflows/node.js.yml

@@ -23,6 +23,6 @@ jobs:
       with:
         node-version: ${{ matrix.node-version }}
         cache: 'yarn'
-    - run: yarn install
+    - run: yarn install --pure-lockfile
     - run: yarn build
     - run: yarn test