[MacPorts] #37413: py-traits version update to 4.2.0

[MacPorts]

#37413: py-traits version update to 4.2.0
---------------------------------+--------------------------------
 Reporter:  jjstickel@…          |      Owner:  macports-tickets@…
     Type:  update               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:  2.1.2
 Keywords:  maintainer haspatch  |       Port:  py-traits
---------------------------------+--------------------------------
 Portfile patch attached. I have tested this port as a dependency to mayavi
 and chaco.

 Note that there are some old patchfiles associated with this port that are
 no longer needed. They can be deleted.

-- 
Ticket URL: <https://trac.macports.org/ticket/37413>
MacPorts <http://www.macports.org/>
Ports system for Mac OS