message: [github-actions] fix brew install issue on macOS
  When brew install ninja, python 3.9 is being installed as a
  dependency. However, the installation failed because there is a
  conflict on binary /usr/local/bin/2to3.
diff: @@ -54,6 +54,7 @@ jobs:
  submodules: true
  - name: Bootstrap
  run: |
  + rm -f '/usr/local/bin/2to3'
  brew update
  brew reinstall boost cmake cpputest dbus jsoncpp ninja
  - name: Build
  