Bump version to 2.0.0.
Bump version to 2.0.0.

juansgaitan/passport-facebook,fridaystreet/passport-facebook,bwong199/passport-facebook,bqevin/passport-facebook,alanngyf/passport-facebook,danywarner/passport-facebook,gastonelhordoy/passport-facebook,kiritoe/passport-facebook,captainamerican/passport-facebook,noppoMan/passport-facebook,TMDer/passport-facebook,mvokal/passport-facebook,shastings517/passport-facebook,jaredhanson/passport-facebook,mjsun/passport-facebook,stuti1234/passport-facebook,rmacqueen/passport-facebook,matuszeman/passport-facebook