Update ci.yml

Author: dblythy

.github/workflows/ci.yml

@@ -20,5 +20,7 @@ jobs:
       uses: actions/setup-node@v1
       with:
         node-version: ${{ matrix.node-version }}
+    - name: Install Dependancies
+      run: npm install
     - name: Check Spelling
       run: npm run spelltest