[MacPorts] #53984: jags: update to 4.2.0

[MacPorts]

#53984: jags: update to 4.2.0
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 Reporter:  ecbrown  |      Owner:
     Type:  update   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:
 Keywords:           |       Port:  jags
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 JAGS 4.2.0 is available, whereas Macports currently has 4.1.0.

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Ticket URL: <https://trac.macports.org/ticket/53984>
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