ci: install packages before run commands

Author: nodkz

.github/workflows/nodejs.yml

@@ -5,28 +5,27 @@ name: Node.js CI
 
 on:
   push:
-    branches: [ master ]
+    branches: [master]
   pull_request:
-    branches: [ master ]
+    branches: [master]
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     strategy:
       matrix:
         node-version: [10.x, 12.x]
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
-      with:
-        node-version: ${{ matrix.node-version }}
-    - run: yarn lint
-    - run: yarn test
-      env:
-        CI: true
-    - run: yarn build --if-present
-
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: yarn
+      - run: yarn lint
+      - run: yarn test
+        env:
+          CI: true
+      - run: yarn build --if-present