Add exception formatting and colorization to iex
Don't use Regex module inside Exception, as it may not be available
Respond to review comments
remove all deprecated // and replace with \
Remove valid_requirement?/1 from CHANGELOG
Merge branch 'iex-exceptions-take-2' of github.com:pragdave/elixir into pragdave-iex-exceptions-take-2
Only justify applications in IEx  stacktraces
Print warning when inspect fails
Fix build and remove warnings
Release v0.12.3
Start 0.12.4-dev
Enable erlang 17.0 support and squelch some warnings
Remove deprecate code
:override option should override the version requirement