Update copyright year in LICENSE.
Update copyright year in LICENSE.

sunfei/DOUAudioStreamer,royalwang/DOUAudioStreamer,xuanyi0627/DOUAudioStreamer,douban/DOUAudioStreamer,zhantss/DOUAudioStreamer,Learn-IOS/DOUAudioStreamer,NghiaTranUIT/DOUAudioStreamer,xuanyi0627/DOUAudioStreamer,QiuZhiFei/DOUAudioStreamer,jonesgithub/DOUAudioStreamer,royalwang/DOUAudioStreamer,xuanyi0627/DOUAudioStreamer,hjw6160602/DOUAudioStreamer,jonesgithub/DOUAudioStreamer,cute/DOUAudioStreamer,ycaihua/DOUAudioStreamer,talkmate/DOUAudioStreamer,cute/DOUAudioStreamer,ycaihua/DOUAudioStreamer,hjw6160602/DOUAudioStreamer,sunfei/DOUAudioStreamer,QiuZhiFei/DOUAudioStreamer,eyu1988/DOUAudioStreamer,NghiaTranUIT/DOUAudioStreamer,hjw6160602/DOUAudioStreamer,sunfei/DOUAudioStreamer,Learn-IOS/DOUAudioStreamer,douban/DOUAudioStreamer,zhantss/DOUAudioStreamer,royalwang/DOUAudioStreamer,NghiaTranUIT/DOUAudioStreamer,talkmate/DOUAudioStreamer,zhouwude/DOUAudioStreamer,zhouwude/DOUAudioStreamer,eyu1988/DOUAudioStreamer