[MacPorts] #48980: mu: Update version to 0.9.13

[MacPorts]

#48980: mu: Update version to 0.9.13
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 Reporter:  chunyang@…  |      Owner:  sean@…
     Type:  update      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.3.3
 Keywords:              |       Port:  mu
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Ticket URL: <https://trac.macports.org/ticket/48980>
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