[MacPorts] #54549: HexFiend: Update to 2.8.0

[MacPorts]

#54549: HexFiend: Update to 2.8.0
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 Reporter:  sierkb  |      Owner:
     Type:  update  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  hexfiend
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 Update port to most recent version, which is v.2.8.0.
 Maybe take https://trac.macports.org/ticket/53486 into account as well.

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Ticket URL: <https://trac.macports.org/ticket/54549>
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