[MacPorts] #31116: Update py*-yaml to 3.10 and add py3*-yaml

[MacPorts]

#31116: Update py*-yaml to 3.10 and add py3*-yaml
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 Reporter:  nad@…        |       Owner:  macports-tickets@…                   
     Type:  update       |      Status:  new                                  
 Priority:  Normal       |   Milestone:                                       
Component:  ports        |     Version:  2.0.2                                
 Keywords:               |        Port:  py25-yaml,py26-yaml,py27-yaml        
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 [http://pyyaml.org/wiki/PyYAML]

 1. 3.10 drops support for py24: update existing py25-, py26-, and py27-
 ports


 2. add new py32- and py31- ports


 3. change build dependency to use py*-cython instead of py*-pyrex

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Ticket URL: <https://trac.macports.org/ticket/31116>
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