[MacPorts] #66069: doxygen @1.9.5 upgrade failure on 10.13.6: error: call to unavailable function 'get': introduced in macOS 10.14

[MacPorts]

#66069: doxygen @1.9.5 upgrade failure on 10.13.6: error: call to unavailable
function 'get': introduced in macOS 10.14
----------------------+--------------------
  Reporter:  rufty    |      Owner:  kencu
      Type:  defect   |     Status:  closed
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.8.0
Resolution:  fixed    |   Keywords:
      Port:  doxygen  |
----------------------+--------------------

Comment (by kencu):

 stronk -- I'm very sorry to revert your commit, but doxygen is a core port
 for a great many builds, and MacPorts still supports many systems this
 build fails on.

 If you want to run the latest-greatest doxygen, you could install doxygen-
 devel and have it right now. It's a drop-in replacement for you.

 The royal "we" will sort out what to do with doxygen-devel and once it's
 sorted out, we'll move that vetted fix into the doxygen port.

-- 
Ticket URL: <https://trac.macports.org/ticket/66069#comment:5>
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