Bump version to 2.0.0
Bump version to 2.0.0

pyca/bcrypt,pyca/bcrypt,alex/bcrypt,alex/bcrypt,growingdever/bcrypt,reaperhulk/bcrypt,pyca/bcrypt,pyca/bcrypt,reaperhulk/bcrypt,reaperhulk/bcrypt,growingdever/bcrypt,alex/bcrypt,reaperhulk/bcrypt,growingdever/bcrypt