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

[MacPorts]

#51310: ImageMagick: update to 7.x
--------------------------+------------------------
  Reporter:  mopihopi     |      Owner:  ryandesign
      Type:  update       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  ImageMagick  |
--------------------------+------------------------

Comment (by qpanda):

 I would be keen to install ImageMagick with MacPorts but not having an up-
 to-date version available is a show stopper for me. The state of this port
 has already resulted in
 [https://github.com/ImageMagick/ImageMagick/issues/1770 ImageMagick to
 recommend Homebrew over MacPorts]. Would really appreciate if this could
 be moved to version 7 and kept up to date.

-- 
Ticket URL: <https://trac.macports.org/ticket/51310#comment:58>
MacPorts <https://www.macports.org/>
Ports system for macOS