Version to 2.6.4
Version to 2.6.4

Signed-off-by: Dmitriy Zaporozhets <be23d75b156792e5acab51b196a2deb155d35d6a@gmail.com>

rgroux/grit,flycutter/grit,rgroux/grit,flycutter/grit,gitlabhq/grit,abicky/grit,gitlabhq/grit