[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 joostdekeijzer):

 Hi Andreas,

 You can git-clone my branch and install ImageMagick-7 via `port` using a
 local repository. See https://guide.macports.org/#development.local-
 repositories as a startpoint.

-- 
Ticket URL: <https://trac.macports.org/ticket/51310#comment:28>
MacPorts <https://www.macports.org/>
Ports system for macOS