XCODE not installing pods

Question

i am trying to install pod in my project and getting the error

GoogleAppMeasurement requires CocoaPods version >= 1.10.2, which is not satisfied by your current version, 1.10.1.

i tried with the brew and it gives me this error:

The following directories are not writable by your user:
/usr/local/share/zsh
/usr/local/share/zsh/site-functions

You should change the ownership of these directories to your user.
  sudo chown -R $(whoami) /usr/local/share/zsh /usr/local/share/zsh/site-functions

And make sure that your user has write permission.
  chmod u+w /usr/local/share/zsh /usr/local/share/zsh/site-functions

Does anyone has a solution for this i am stucking in it for a long time?