Sanic-security

+ Validation patch for edge case occurrence.

+ Optional `allow_unverified` parameter removed from `request_two_step_verification` method.
+ Account validation check removed from two-step verification request process.
+ Validation documentation.

+ Login route blueprint patch.

+ Constrained method types.
+ `register` no longer returns a two-step session.
+ `allow_unverified` optional parameter in most verification methods.
+ Registration error handling patch.
+ Documentation revisions.

+ Verification request failsafe for unverified accounts.

+ `allow_unverified` parameter removed from `requires_two_step_verification` decorator method
+ Unit test improvements
+ Role authorization fixes
+ `InvalidIdentifierError` exception removed
+ `verify_account` requires a Sanic request to be passed instead of a two-step session
+ Middleware removed
+ Documentation revisions