[MacPorts] #59429: ocaml: Update to 4.09.0 and fix livecheck

[MacPorts]

#59429: ocaml: Update to 4.09.0 and fix livecheck
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  Reporter:  ryandesign  |      Owner:  pmetzger
      Type:  update      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  ocaml       |
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Comment (by jason-johnson):

 For me livecheck is working but the version is still behind.  OCaml 4.10
 has been released but the ports version is still on 4.08.1.  I would do a
 pull request myself but it's not clear to me how to test it.  Is there
 some docker image or something where we can check out the forked repo and
 make changes?

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Ticket URL: <https://trac.macports.org/ticket/59429#comment:7>
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