Check out the v1.6.1 release notes.
Check out the v1.6.0 release notes.
Check out the v1.5.3 release notes.
Check out the v1.5.2 release notes.
Check out the v1.5.1 release notes.
Check out the v1.5.0 release notes.
Check out the v1.4.0 release notes.
Check out the v1.3.0 release notes.