[MacPorts] #38917: R-app: change dependency to non-obsolete port

[MacPorts]

#38917: R-app: change dependency to non-obsolete port
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  Reporter:  newberg@…  |      Owner:  kjell.konis@…
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.1.3
Resolution:             |   Keywords:
      Port:  R-app      |
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Comment (by kjell.konis@…):

 Maintainer here. Version bump: R-app 1.60 corresponds to R 3.0.0. A couple
 of notes:

 (1) There are no 32 bit configurations for R.app anymore.

 (2) This port does not work on Snow Leopard. It's not clear what's going
 wrong so it's going to take some digging.

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Ticket URL: <https://trac.macports.org/ticket/38917#comment:5>
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