[MacPorts] #44639: mpv: update to 0.5.0

[MacPorts]

#44639: mpv: update to 0.5.0
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 Reporter:  ionic@…              |      Owner:  macports-tickets@…
     Type:  update               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:
 Keywords:  haspatch maintainer  |       Port:  mpv
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 `mpv` just received an update.

 Patch will be attached.

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Ticket URL: <https://trac.macports.org/ticket/44639>
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