message: chore: cache yarn, not npm
diff: @@ -17,17 +17,15 @@ jobs:
  steps:
  - name: checkout code
  uses: actions/checkout@v1
  - - name: cache node modules
  - uses: actions/cache@v1
  - env:
  - cache-name: cache-node-modules
  + - name: get yarn cache
  + id: yarn-cache
  + run: echo "::set-output name=dir::$(yarn cache dir)"
  + - uses: actions/cache@v1
  with:
  - path: ~/.npm # npm cache files are stored in `~/.npm` on Linux/macOS
  - key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/yarn.lock') }}
  + path: ${{ steps.yarn-cache.outputs.dir }}
  + key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
  restore-keys: |
  - ${{ runner.os }}-build-${{ env.cache-name }}-
  - ${{ runner.os }}-build-
  - ${{ runner.os }}-
  + ${{ runner.os }}-yarn-
  - name: use node.js ${{ matrix.node-version }}
  uses: actions/setup-node@v1
  with:
  