Omniauth JWT gem has incompatible JWT gem version

The decode method in https://github.com/mbleigh/omniauth-jwt/blob/master/lib/omniauth/strategies/jwt.rb#L26 will not work if using the JWT gem version 1.0. This is due to the fact that JWT.decode now returns an array and not an hash which in turn will cause https://github.com/mbleigh/omniauth-jwt/blob/master/lib/omniauth/strategies/jwt.rb#L28 !@decoded.key?(field.to_s) will raise a NoMethodError on the key? method that does not exist for an Array object.

This was not caught during development and it was my fault. I apologize for any inconvenience this may have caused.