[MacPorts] #51310: ImageMagick: update to 7.x

[MacPorts]

#51310: ImageMagick: update to 7.x
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  Reporter:  mopihopi     |      Owner:  ryandesign
      Type:  update       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  ImageMagick  |
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Comment (by joostdekeijzer):

 I'd like to "bump" this ticket :)

 In https://github.com/macports/macports-
 ports/commit/3d5f5e5a381caae17a6a4cd5c0b04b72d898bc16 I see that for a v6
 update a revision bump is needed for all ports that link to imagemagick.

 Would this be the time to also make the split between the v6 and v7 port?

 I've updated my PR to include the most recent ImageMagick v7 code.

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Ticket URL: <https://trac.macports.org/ticket/51310#comment:29>
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