[MacPorts] #50590: udunits2: update to 2.2.20

[MacPorts]

#50590: udunits2: update to 2.2.20
--------------------------+-----------------------
  Reporter:  ckhroulev@…  |      Owner:  takeshi@…
      Type:  update       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  udunits2     |
--------------------------+-----------------------
Changes (by mf2k@…):

 * owner:  macports-tickets@… => takeshi@…
 * version:  2.3.4 =>


Comment:

 In the future, please Cc the port maintainers ({{{port info --maintainers
 udunits2}}}), if any.

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Ticket URL: <https://trac.macports.org/ticket/50590#comment:1>
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