[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 petr@…):

 Grass 7.0 is [http://grass.osgeo.org/news/42/15/GRASS-GIS-7-0-0/ stable]
 now, so need for a `-devel` / `-beta` port.

 Moreover: The requirements are not very explicit about versions, but I do
 not see any reason why grass would need to stick to `proj47`, grass is one
 of the few remaining ports which still depend on `proj47`.

 I also would like to request to add a `+postgresql93` variant. Would you
 like me to file a separate ticket on this?

 @mojca: No chance that you become a maintainer ;-)

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Ticket URL: <https://trac.macports.org/ticket/44056#comment:18>
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