maintainer-feedback requested: [Bug 251095] graphics/py-pygraphviz: Update to 1.6

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Bug 251095: graphics/py-pygraphviz: Update to 1.6
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251095



--- Description ---
graphics/py-pygraphviz: Update to 1.6

 * Drop python2 support (python 3.6+)
 * Add devel/nose and devel/py-doctest-ignore-unicode in TEST_DEPENDS

 Changelog:

   <URL to changelog>

 [1] Upstream reference URL (pull request, issue, mailing list)

QA:

  * portlint: OK (looks fine.)
  * testport: OK (poudriere: 11/12/13 amd64/i386 py27/py37)
  * maketest: OK (99 of 99 tests PASS)