Bump to 1.2.0.
Bump to 1.2.0.

StevenTsai/pollexor,chenrui2014/pollexor,hambroperks/pollexor,qingsong-xu/pollexor,qingsong-xu/pollexor,hambroperks/pollexor,chenrui2014/pollexor,hambroperks/pollexor,chenrui2014/pollexor,square/pollexor,hambroperks/pollexor,StevenTsai/pollexor,qingsong-xu/pollexor,StevenTsai/pollexor,square/pollexor