brew - 🍺 The missing package manager for macOS

Age	Commit message (Collapse)	Author
2018-03-03	Adjust docs and more internal code for Python 3.	Mike McQuaid
	Now we have `python` for Python 3 and `python@2` for Python 2 some more adjustments need to be made.
2018-01-18	Deprecate requirements harder	Mike McQuaid
	Remove more Requirement logic to enable future removal of default formula logic. Also, output deprecations, convert symbol requirement usage to deps and simplify the compatibility code for the direct Requirement usage.
2017-12-30	requirements: move more to compat.	Mike McQuaid

2017-12-23	Deprecate more requirements.	Mike McQuaid
	These are ones that were either already deprecated due to audit rules or are just a simple `which` with a `default_formula` so should just be a dependency.