Podspec update to 2.2.0
Podspec update to 2.2.0

AzenXu/DACircularProgress,creationst/DACircularProgress,wanglongshuai/DACircularProgress,jonesgithub/DACircularProgress,xswm1123/DACircularProgress,dawangjiaowolaixunshan/DACircularProgress,CoderJFCK/DACircularProgress,zhuayi/DACircularProgress,AntiMoron/DACircularProgress,sidorov-panda/DACircularProgress,sujeking/DACircularProgress,drekka/DACircularProgress,mluisbrown/DACircularProgress,danielamitay/DACircularProgress