Added Sina Weibo web to podspec
Added Sina Weibo web to podspec

AlexanderMazaletskiy/SimpleAuth,jiakai-lian/SimpleAuth,hyperspacemark/SimpleAuth,martinpilch/SimpleAuth,tipbit/SimpleAuth,tofaruk/SimpleAuth-1,hoanganh6491/SimpleAuth,adamjmcgrath/SimpleAuth-1,sburavtsov/SimpleAuth,calebd/SimpleAuth,machelix/SimpleAuth