[MacPorts] #47894: rb-rmagick: update to 2.15.0

[MacPorts]

#47894: rb-rmagick: update to 2.15.0
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 Reporter:  ryandesign@…  |      Owner:  macports-tickets@…
     Type:  update        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:
 Keywords:                |       Port:  rb-rmagick
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 Please update rb-rmagick to the latest version, currently 2.15.0. This may
 help rb-rmagick to build with the version of ImageMagick currently in
 MacPorts. The project has (temporarily?) moved here:
 https://github.com/gemhome/rmagick/ . rubyforge.org is down because of
 database server problems so I cannot see what they say about this.

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Ticket URL: <https://trac.macports.org/ticket/47894>
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