message: use shallow clone also for OS X
diff: @@ -21,7 +21,10 @@ jobs:
  runs-on: [macos-latest]
  steps:
  - - uses: actions/checkout@v2
  + - name: Checkout the latest code (shallow clone)
  + uses: actions/checkout@v2
  + with:
  + fetch-depth: 1
  - name: setup
  run: |
  