semantic versioning for github tags

[KZachariassen]

Hi,

We are using semantic versioning tags in github, and we really need to be able to match patch versions without the need to change Puppetfile for every patch release.

So what I need is this:

mod 'pm_platform_base_system',
:git => 'git@github.mygit.com:puppet/pm_platform_base_system.git',
:ref => '0.3.*'