[MacPorts] #55512: py-cheetah: Update to version 3

[MacPorts]

#55512: py-cheetah: Update to version 3
--------------------+------------------------
 Reporter:  mf2k    |      Owner:
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  py-cheetah
--------------------+------------------------
 py-cheetah appears to be forked to [http://cheetahtemplate.org py-
 cheetah3]. Should the existing py-cheetah port simply be updated or should
 a new py-cheetah3 port be created?

 Here are the dependents:
 {{{
 $ port echo depends:py27-cheetah
 gnuradio
 gnuradio-devel
 gnuradio-next
 py27-tahchee
 py27-turbocheetah
 volk
 }}}

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Ticket URL: <https://trac.macports.org/ticket/55512>
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