update all pip packages mac code example

Example 1: python update installed packages

py2
$ pip install pip-review

$ pip-review --local --interactive

py3
$ pip3 install pip-review

$ py -3 -m pip_review --local --interactive

Example 2: update every python library

(Do it in windows powershell)

pip freeze | %{$_.split('==')[0]} | %{pip install --upgrade $_}