[MacPorts] #42721: arpack needs update to @3.1.5

[MacPorts]

#42721: arpack needs update to @3.1.5
----------------------------+--------------------------------
 Reporter:  mschamschula@…  |      Owner:  macports-tickets@…
     Type:  update          |     Status:  new
 Priority:  Normal          |  Milestone:
Component:  ports           |    Version:  2.2.1
 Keywords:                  |       Port:  arpack
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 arpack(-ng) has been updated upstream to @3.1.5.

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Ticket URL: <https://trac.macports.org/ticket/42721>
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