[MacPorts] #44056: grass: upgrade to 7.0.0

[MacPorts]

#44056: grass: upgrade to 7.0.0
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  Reporter:  mojca@…  |      Owner:  macports-tickets@…
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  grass    |
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Comment (by vince@…):

 Could it be possible to add a ‘console’ or 'no-gui’ variant, in order to
 build only the algorithms?
 This could be useful for people such as me, who only use Grass through the
 QGis plugin.
 Thanks!

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Ticket URL: <https://trac.macports.org/ticket/44056#comment:14>
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