6.23.0
#1934 JsonWebToken and JsonWebTokenHandler use System.Text.Json for JSON parsing for targets Net61+.
String splits have been removed and much of the duplicated string copying and processing has been removed resulting in a 20-25% performance increase.
#1924 This delegate will be called just before a token has the SignatureValidated. This allows for preprocessing of the token prior to signature validation. This is currently only used by the JsonWebTokenHandler.