[MacPorts] #53048: libbiosig @1.8.0: update to 1.8.4

[MacPorts]

#53048: libbiosig @1.8.0: update to 1.8.4
---------------------------------+-----------------------
 Reporter:  neurodroid           |      Owner:
     Type:  update               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:
 Keywords:  haspatch maintainer  |       Port:  libbiosig
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 Several bug fixes & compatibility improvements
 Maintainer (christsc at gmx.de) posts from github account

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Ticket URL: <https://trac.macports.org/ticket/53048>
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