Update keywords and prepare v2.1.10 release

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.1' into 2.2
Prepare v2.2.3 release

Signed-off-by: crynobone <crynobone@gmail.com>
Deprecate `orchestra.validate: user.registration`
event and replace it with `orchestra.validate: user.account.register` event.

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.1' into 2.2

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.2'