ci(github): use default Node.js version in build.yml

Author: remarkablemark

.github/workflows/build.yml

@@ -5,20 +5,15 @@ jobs:
   build:
     runs-on: ubuntu-latest
     timeout-minutes: 5
-    strategy:
-      matrix:
-        node-version: [16]
 
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
         with:
           fetch-depth: 0
 
-      - name: Use Node.js ${{ matrix.node-version }}
+      - name: Use Node.js
         uses: actions/setup-node@v2
-        with:
-          node-version: ${{ matrix.node-version }}
 
       - name: Cache dependencies
         uses: actions/cache@v2