[MacPorts] #49762: processing: update to 3.0

[MacPorts]

#49762: processing: update to 3.0
---------------------------+--------------------------------
 Reporter:  enekogotzon@…  |      Owner:  macports-tickets@…
     Type:  update         |     Status:  new
 Priority:  Normal         |  Milestone:
Component:  ports          |    Version:  2.3.4
 Keywords:                 |       Port:  processing
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 Current version of processing port: 1.2.1.
 Current stable release: 3.0.

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Ticket URL: <https://trac.macports.org/ticket/49762>
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