[MacPorts] #42167: demeter: update to 0.9.19; use github portgroup; remove active_variants portgroup

[MacPorts]

#42167: demeter: update to 0.9.19; use github portgroup; remove active_variants
portgroup
---------------------------+-------------------------------
  Reporter:  ryandesign@…  |      Owner:  macsforever2000@…
      Type:  update        |     Status:  closed
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:  fixed         |   Keywords:  haspatch
      Port:  demeter       |
---------------------------+-------------------------------
Changes (by macsforever2000@…):

 * status:  new => closed
 * version:  2.2.1 =>
 * resolution:   => fixed


Comment:

 I'm calling this fixed. The port is at the latest release version
 currently. Ryan, thanks for the portfile improvements!

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Ticket URL: <https://trac.macports.org/ticket/42167#comment:4>
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