[MacPorts] #40081: py-sympy: update to 0.7.3

[MacPorts]

#40081: py-sympy: update to 0.7.3
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 Reporter:  ryandesign@…  |      Owner:  stromnov@…
     Type:  update        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:
 Keywords:                |       Port:  py-sympy
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 0.7.3 is available: https://github.com/sympy/sympy/releases

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Ticket URL: <https://trac.macports.org/ticket/40081>
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