This adds a new enum named VerificationLevel to denote said verification
level. This enum will also be used in the Client.edit_server calls
instead of the undocumented int parameter.
When clicking on an invite link without having a Discord account it's
possible to create an unclaimed account for joining the conversation
quickly. Add register() method to Client that performs and invite based
registration of an unclaimed account.
Rapptz
Khazhismel Kumykov
Hornwitser