[MacPorts] #44134: Update assimp to 3.1.1

[MacPorts]

#44134: Update assimp to 3.1.1
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 Reporter:  szhorvat@…  |      Owner:  macports-tickets@…
     Type:  update      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.3.0
 Keywords:              |       Port:  assimp
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 This is a request to update assimp to the latest version, which is 3.1.1.

 The version currently available produces broken .dae files for me.

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Ticket URL: <https://trac.macports.org/ticket/44134>
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