[MacPorts] #50762: GiNaC @1.6.6_0: update to 1.6.7

[MacPorts]

#50762: GiNaC @1.6.6_0: update to 1.6.7
---------------------------------+--------------------------------
 Reporter:  mschamschula@…       |      Owner:  macports-tickets@…
     Type:  update               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:  2.3.4
 Keywords:  haspatch maintainer  |       Port:  GiNaC
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 GiNaC has been updated to version 1.6.7. New this version:
 * Fix elusive bugs in sqrfree(), normal(), numer(), and denom().

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Ticket URL: <https://trac.macports.org/ticket/50762>
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