[MacPorts] #54942: stimfit @0.14.13: update to 0.15.4

[MacPorts]

#54942: stimfit @0.14.13: update to 0.15.4
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 Reporter:  neurodroid           |      Owner:
     Type:  update               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:
 Keywords:  haspatch maintainer  |       Port:  stimfit
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 * Addresses a number of issues
 * Fixes compilation on High Sierra

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Ticket URL: <https://trac.macports.org/ticket/54942>
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