[MacPorts] #47034: crystal: Update version and add gtkdoc variant

[MacPorts]

#47034: crystal: Update version and add gtkdoc variant
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  Reporter:  rkirian@…    |      Owner:  macports-tickets@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  haspatch maintainer
      Port:  crystfel     |
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Comment (by khindenburg@…):

 The obvious choice would be to use a subport.  However, I can't really see
 a difference when built with gtk-doc and without.

 The source already has the docs build "Generated by GTK-Doc V1.18";  if
 you build with gtk-doc "GTK-Doc V1.22 (XML mode)"

 I'm not clear if it is even worth the effort to have gtk-doc at all.

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Ticket URL: <https://trac.macports.org/ticket/47034#comment:3>
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