Allow a minimum ruby version in Gemfile

[moore3071]

Allow for setting a minimum ruby version at least to the minor version number in the gemfile. This would be very helpful when working with a cross-distro group that doesn't want to use rvm (an Arch user with a Debian user pulling from pacman's repos and dpkg for their respective Ruby packages).

[segiddins]

As of 1.12, you can do ruby "~> 2.3.0", does that accomplish what you need?

[moore3071]

That does, I've just seen little documentation of it, and a general search reveals some weirder solutions. Thanks for you help.