* Add ecs 1.6.0 and refresh master ecs (2.0.0) * update rule metadata to use ecs_version 1.6.0
Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> Co-authored-by: Andrew Pease <7442091+peasead@users.noreply.github.com> Co-authored-by: Devon Kerr <19266650+devonakerr@users.noreply.github.com>