Version 1.2.0

• Not passing request.body to ResourceProtector, #485.
• Use flask.g instead of _app_ctx_stack, #482.
• Add headers parameter back to ClientSecretJWT, #457.
• Always passing realm parameter in OAuth 1 clients, #339.
• Implemented RFC7592 Dynamic Client Registration Management Protocol, #505`
• Add default_timeout for requests OAuth2Session and AssertionSession.
• Deprecate jwk.loads and jwk.dumps