[MacPorts] #61087: megatools: update to 1.10.3

[MacPorts]

#61087: megatools: update to 1.10.3
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  Reporter:  grr        |      Owner:  (none)
      Type:  update     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  megatools  |
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Comment (by ryandesign):

 Usually we would not use "experimental" versions in MacPorts, but the
 megatools homepage actually recommends that we do:

 > Unless you have reasons to run something else, this is the recommended
 version.

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Ticket URL: <https://trac.macports.org/ticket/61087#comment:2>
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