update hunter version to fix missing packages in non $ENV{HUNTER_ROOT} builds (i.e., travis)
update hunter version to fix missing packages in non $ENV{HUNTER_ROOT} builds (i.e., travis)

ruslo/gatherer,ruslo/gatherer,headupinclouds/gatherer,ruslo/gatherer,headupinclouds/gatherer,headupinclouds/gatherer,headupinclouds/gatherer