Module definition change in guard 2.0

Guard has changed its Plugin module, so in the future the Guard::Guard module will be fully deprecated.
Right now there is a very annoying deprecation message. With the title: "BIG DEPRECATION MESSAGE"

Have tested this locally, let me know if you need anymore help

https://github.com/guard/guard/wiki/Upgrading-to-Guard-2.0#changes-in-guardguard