[MacPorts] #56636: Eric4 is obsolete. Update to Eric6

[MacPorts]

#56636: Eric4 is obsolete. Update to Eric6
--------------------------+--------------------
  Reporter:  josephsacco  |      Owner:  (none)
      Type:  update       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.5.2
Resolution:               |   Keywords:
      Port:  eric4        |
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Comment (by josephsacco):

 Older versions of OSX do not support QT5.  I modified the Portfile th make
 QT4 the default for older versions:
 {{{
   if { ${os.major} < 10 } {
         default_variants    +pyqt4
     }
 }}}

 See attachment:  Portfile_08Aug2018

 -Joseph

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Ticket URL: <https://trac.macports.org/ticket/56636#comment:20>
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