update support for pyjwt eddsa
update support for pyjwt eddsa

https://github.com/jpadilla/pyjwt/pull/455 https://github.com/jpadilla/pyjwt/pull/531 these are some proved about the support of pyjwt eddsa.
simo5/jsonwebtoken.github.io,simo5/jsonwebtoken.github.io