[MacPorts] #64110: swig-ruby @4.0.2_3: add newer Ruby ports as variants

[MacPorts]

#64110: swig-ruby @4.0.2_3: add newer Ruby ports as variants
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 Reporter:  outis        |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  swig-ruby swig3-ruby
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 This ticket is an update to #57650 for newer Ruby versions.

 The Ruby variants that swig-ruby (and swig3-ruby) offers are for
 deprecated versions (e.g. installing ruby24 prints a note that "This port
 is deprecated since the project is no longer maintained upstream. [...]").
 Currently, swig-ruby and swig3-ruby don't offer variants for any non-
 deprecated Ruby port. Please add variants for at least ruby27 and ruby30,
 if not ruby25 and ruby26 (I haven't been able to find the most recent
 portfile for swig*-ruby to test). Once the variants have been tested in
 the wild, the default variants could be update from ruby23.

 The older variants can remain as-is, until their dependencies are removed.

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Ticket URL: <https://trac.macports.org/ticket/64110>
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