message: Use matrix-os in runs-on
diff: @@ -12,13 +12,13 @@ on:
  jobs:
  build:
  - runs-on: ubuntu-latest
  -
  strategy:
  matrix:
  os: [ubuntu-latest, windows-latest]
  node-version: [10.x, 12.x, 14.x]
  + runs-on: ${{ matrix.os }}
  +
  steps:
  - uses: actions/checkout@v2
  - name: Use Node.js ${{ matrix.node-version }}
  