Update ci.yml

Author: gabrielcsapo

.github/workflows/ci.yml

@@ -20,6 +20,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps: 
+      - uses: actions/checkout@v1
+      - uses: volta-cli/action@v1
+        with:
+          node-version: ${{ matrix.node }}
+      - name: install dependencies
+        run: npm i
       - name: lint
         run: npm run lint
         env: