Promote StateComponent to beta

[srt32]

TODO:

We need to apply functional color changes before promoting.

We want to go from

     COLOR_DEFAULT => "",
      :green => "State--green",
      :red => "State--red",
      :purple => "State--purple"
    }.freeze

to

     COLOR_DEFAULT => "",
      :open  => "State--open",
      :closed => "State--closed",
      :merged => "State--merged"
    }.freeze

We should be able to use #135 as inspiration, which will allow for backwards compatibility.