[MacPorts] #62048: portmidi: update to r234

[MacPorts]

#62048: portmidi: update to r234
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  Reporter:  mascguy   |      Owner:  mascguy
      Type:  update    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  portmidi  |
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Description changed by mascguy:

Old description:

> Our version of `portmidi` is very out-of-date, and needs to be updated.
>
> As part of this upgrade, I'll also tackle the build failures on Big Sur
> and older macOS releases:
>
> issue:41610

New description:

 Our version of `portmidi` is very out-of-date, and needs to be updated.

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Ticket URL: <https://trac.macports.org/ticket/62048#comment:2>
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