[MacPorts] #53840: py-astropy: update to 1.3.1

[MacPorts]

#53840: py-astropy: update to 1.3.1
----------------------+------------------------
 Reporter:  lpsinger  |      Owner:
     Type:  update    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:            |       Port:  py-astropy
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 Please update py-astropy to the latest version, 1.3.1.

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Ticket URL: <https://trac.macports.org/ticket/53840>
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