SE-0254: Static and class subscripts

[David_Sweeris]

@anandabits

@Ben_Cohen

Like other discrepancies between functions and subscripts (most of which are already fixed these days :), I see this practically as a bug fix rather than a language change, so I'm very much in favor of this proposal.

+1. Looking forward to seeing static callable go in this direction as well in the future. I work with metatypes on a regular basis and would like to see as many limitations on them lifted as possible.

+1 for these reasons, along with whatever I said last time they came up :-)