sci-biology/bcftools: fix PYTHON_COMPAT, add missing matplotlib dep
From NEWS one can infer bcftools was at least from about 1.7 version
python3 compatible. Moreover, at the moment the shenbang lines specifically
call python3.6. So, adjust the PYTHON_COMPAT accordingly. matplotlib is
used by the python scripts, unconditionally.
Package-Manager: Portage-2.3.84, Repoman-2.3.20
Closes: https://github.com/gentoo/gentoo/pull/14421
Signed-off-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
Signed-off-by: David Seifert <soap@gentoo.org>