[MacPorts] #55554: sumo @ 0.31.0 Update to new release

[MacPorts]

#55554: sumo @ 0.31.0 Update to new release
---------------------------------+------------------
 Reporter:  lockhart             |      Owner:
     Type:  update               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:
 Keywords:  haspatch maintainer  |       Port:  sumo
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 SUMO has a new release. This simple patch updates the version number,
 checksums, and removes one obsolete line of regex substitution.

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Ticket URL: <https://trac.macports.org/ticket/55554>
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