[MacPorts] #60148: mkvtoolnix: Update to version 43

[MacPorts]

#60148: mkvtoolnix: Update to version 43
-------------------------+------------------------
  Reporter:  mf2k        |      Owner:  ryandesign
      Type:  update      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  mkvtoolnix  |
-------------------------+------------------------

Comment (by ryandesign):

 Instead of adding a subport, I would rather the port just install the
 latest version that's compatible with whatever OS the user has. But I'm
 not working on updating this port right now. If someone else wants to do
 the work that's great.

-- 
Ticket URL: <https://trac.macports.org/ticket/60148#comment:3>
MacPorts <https://www.macports.org/>
Ports system for macOS