_PREMAKE_VERSION

Stores the version of the currently executing instance of Premake, in the form "major.minor.patch.dev".

The current development version (i.e. what's in the git repository) uses the development version "dev", as in "5.0.0.dev". When a development release is made, this will become "5.0.0.alpha1", then "5.0.0.alpha2", "5.0.0.beta1" and so on, until the final release "5.0.0".