v2.1.0

• added a third parameter for findById helper, when findById is used in relation to an access
  token or an authorization code the token instance will be passed
• added ctx.oidc.signed with an array of parameter names which were received using a signed or
  encrypted request/Uri parameter.
• signed array of strings is available in the short lived session for interactions
• added basic sequelize adapter example
• fixed a bug where extraParams weren't recognized when part of a request or request_uri parameters
• fixed a bug where client credential and refresh token adapter instances were used even if these
  grants/tokens weren't enabled
• fixed a bug which allowed for non-enabled scopes to be added in client_credential grants