ci: Add prettier test

Author: buffcode

.github/workflows/prettier.yml

@@ -0,0 +1,32 @@
+name: Prettier
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: ['16']
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+          check-latest: true
+      - name: Cache Node.js modules
+        id: yarn-cache
+        uses: actions/cache@v2
+        with:
+          path: '**/node_modules'
+          key: ${{ runner.os }}-modules-${{ hashFiles('**/yarn.lock') }}-${{ matrix.node-version }}
+      - name: Install dependencies
+        if: steps.yarn-cache.outputs.cache-hit != 'true'
+        run: yarn install --frozen-lockfile
+      - name: Build
+        run: yarn prettier:lint