[MacPorts] #45302: mpv: update to 0.6.0

[MacPorts]

#45302: mpv: update to 0.6.0
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 Reporter:  marek.krolikowski@…  |      Owner:  macports-tickets@…
     Type:  update               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:  2.3.1
 Keywords:                       |       Port:  mpv
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 There is new version of mpv.

 I'm attaching the patch. It's tested, mpv builds and works (command line
 and bundle).

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Ticket URL: <https://trac.macports.org/ticket/45302>
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