Not sure if this was intentional, pull request shortly

Hi!

You have pessimistic versioning of Pry (which prevents use of pry 0.9 or newer):

gem "pry", "~> 0.8.3"

I'd like to report that I tested the code with pry 0.9.1, and it still works - could you please update accordingly? :)

Hey guy, great work on this gem btw,

I was wondering if you'd consider integrating commands like next and step and so on into pry itself, and having pry actually wrap the debugger (rather than the other way round) for more seamless use?

THat would be pretty damn awesome ;) I contact the ruby-debug maintainer asking him how to go about accessing the next and step functionality, but he hasnt responded to me yet :(

anyway, just a few thoughts!

keep up the good work!