[MacPorts] #57825: Upgrade: GHC from 7.8.3 to at least 8.4.3

[MacPorts]

#57825: Upgrade: GHC from 7.8.3 to at least 8.4.3
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 Reporter:  mouse07410  |      Owner:  (none)
     Type:  update      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:              |       Port:  ghc
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 First, could you please upgrade GHC from the old 7.8.3 to the current
 8.4.3, or better yet - 8.6.3? Considering that 8.8.3 is about to be
 released?

 And as you're at it, could you please update its dependencies from
 llvm-3.5 to, e.g., llvm-7.0?

 Thanks!

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Ticket URL: <https://trac.macports.org/ticket/57825>
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