[MacPorts] #47821: mozjpeg: update to 3.1 and sync with libjpeg-turbo

[MacPorts]

#47821: mozjpeg: update to 3.1 and sync with libjpeg-turbo
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 Reporter:  ryandesign@…  |      Owner:  raimue@…
     Type:  update        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:
 Keywords:                |       Port:  mozjpeg
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 {{{
 $ port livecheck mozjpeg
 mozjpeg seems to have been updated (port version: 3.0, new version: 3.1)
 }}}

 There were also numerous changes made recently to the libjpeg-turbo port.
 Since mozjpeg is a fork of libjpeg-turbo, it would make sense to keep the
 mozjpeg and libjpeg-turbo ports as closely synchronized as possible.

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Ticket URL: <https://trac.macports.org/ticket/47821>
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