Fix cmake macos github CI #100

Running before_all...
  
  + brew install cmake ninja boost
  Error: cmake was installed from the local/pinned tap
  but you are trying to install it from the homebrew/core tap.
  Formulae with the same name from different taps cannot be installed at the same time.
  
  To install this version, you must first uninstall the existing formula:
    brew uninstall cmake
  Then you can install the desired version:
    brew install cmake
  
                                                              ✕ 8.74s
Error: Command brew install cmake ninja boost failed with code 1. 

Error: Process completed with exit code 1.