Install deps for attw task

Author: markerikson

.github/workflows/tests.yml

@@ -200,7 +200,16 @@ jobs:
         node: ['16.x']
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v2
+
+      - name: Use node ${{ matrix.node }}
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node }}
+          cache: 'yarn'
+
+      - name: Install deps
+        run: yarn install
 
       - uses: actions/download-artifact@v2
         with: