[MacPorts] #57933: py-ipython: update to latest version

[MacPorts]

#57933: py-ipython: update to latest version
-------------------------+------------------------
  Reporter:  reneeotten  |      Owner:  stromnov@…
      Type:  update      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  py-ipython  |
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Comment (by stromnov):

 It's not possible until py-prompt_toolkit is bounded to 1.x branch.

 Also take a look on https://lists.macports.org/pipermail/macports-
 dev/2018-October/039447.html

 And excerpt from direct mail to Ryan (29 Sep 2018):

 > Hi,
 >
 >  How to properly upgrade py-ipython to version 7.x?
 >
 >  1) py27-ipython is bounded to ipython 6.x and thus strictly depends on
 older prompt_toolkit < 2.x.
 >
 >  2) py3x-ipython 7.x requires prompt_toolkit >= 2.x
 >
 >  3) prompt_toolkit 1.x and 2.x are incompatible and thus can’t coexists
 in macports tree
 >
 > I can create py-prompt_toolkit1 package and switch py27-python to it,
 but it’ll fail on upgrade for current MacPorts due to conflict between
 installed py27-prompt_toolkit and required py27-prompt_toolkit1.

 For now I'm using latest ipython 7.x Portfile from my own local
 repository.

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Ticket URL: <https://trac.macports.org/ticket/57933#comment:2>
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