0.13.0

• Improve/upgrade OAuth2 scopes support with SecurityScopes:
  • SecurityScopes can be declared as a parameter like Request, to get the scopes of all super-dependencies/dependants.
  • Improve Security handling, merging scopes when declaring SecurityScopes.
  • Allow using SecurityBase (like OAuth2) classes with Depends and still document them. Security now is needed only to declare scopes.
  • Updated docs about: OAuth2 with Password (and hashing), Bearer with JWT tokens.
  • New docs about: OAuth2 scopes.
  • PR #141.