Use multiple rubies on multiple platforms

Current versions

uru requires the following formula to be installed:
go 1.10.1 Open source programming language to build simple/reliable/efficient software

Recent formula history

ilovezfs Use “squiggly” heredocs.
mexisme uru 0.8.1
Zac Stewart uru 0.8.0
Nikolaus Wittenstein Add descriptions to all remaining homebrew packages
Mike McQuaid uru: mark bottle as relocatable.

Formula code at GitHub