[MacPorts] #53291: astyle @2.05.1: update to 3.0

[MacPorts]

#53291: astyle @2.05.1: update to 3.0
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  Reporter:  l2dy    |      Owner:  wyuenho
      Type:  update  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  astyle  |
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Comment (by wyuenho):

 This package is marked as open to anyone to maintain. I don't use this
 package anymore. So feel free to update the Portfile yourself. It should
 be easy. If not, you might want to switch to clang format.

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Ticket URL: <https://trac.macports.org/ticket/53291#comment:4>
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