[issue39273] ncurses does not include BUTTON5_* constants

[Zackery Spytz]

Change by Zackery Spytz <zspytz at gmail.com>:


----------
nosy: +ZackerySpytz
versions:  -Python 3.6, Python 3.7, Python 3.8

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39273>
_______________________________________