[MacPorts] #53162: py-astropy: update to 1.3

[MacPorts]

#53162: py-astropy: update to 1.3
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  Reporter:  lpsinger    |      Owner:  robitaille
      Type:  update      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  py-astropy  |
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Comment (by cdeil):

 This should fix the issue: https://github.com/macports/macports-
 ports/pull/133

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Ticket URL: <https://trac.macports.org/ticket/53162#comment:2>
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