[MacPorts] #55584: port:leveldb : upgrade to 1.20

[MacPorts]

#55584: port:leveldb : upgrade to 1.20
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 Reporter:  RJVB    |      Owner:
     Type:  update  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  leveldb
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 Attached a patch which updates port:leveldb to the current upstream
 release version.

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Ticket URL: <https://trac.macports.org/ticket/55584>
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