update version and changelog to v2.8.0
update version and changelog to v2.7.2
update version and changelog to v2.7.1
update version and changelog to v2.7.0
update version and changelog to v2.6.0
update version and changelog to v2.5.2
update version and changelog to v2.5.1
update version and changelog to v2.5.0
update version and changelog to v2.4.1
update version and changelog to v2.4.0