fix build

.github/workflows/build.yml

@@ -9,12 +9,12 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [8.x]
+        node-version: [12.x]
 
     steps:
       - uses: actions/checkout@v2
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v1
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm ci