Updated POM to allow deployment to Maven Central.
Updated POM to allow deployment to Maven Central.

cjmcn-sh/thumbnailator,sisihuisi/thumbnailator,liyiguang/thumbnailator,westei/thumbnailator,puth/thumbnailator,bpzhang/thumbnailator,kapa76/thumbnailator,icq112771720/thumbnailator,nickleo/thumbnailator,coolshou/thumbnailator,passerby4j/thumbnailator,DavidGOrtega/thumbnailator,herohenu/thumbnailator,codingEcho/thumbnailator,sateeshb/thumbnailator,vfishv/thumbnailator,zhway9909/thumbnailator,atrijitdasgupta/thumbnailator,wenhe666/thumbnailator,zhaochenxi0518/thumbnailator,joyepay/thumbnailator,wangda/thumbnailator,sunwei415/thumbnailator,mxgsa/thumbnailator,maleck13/thumbnailator,voole/thumbnailator,Jframeye/thumbnailator,linpeixun/thumbnailator,mirszhao/thumbnailator,yehwang/thumbnailator,feexon/thumbnailator,ghosta3/thumbnailator,ldx007/thumbnailator,xuyanxiang/thumbnailator,jasonqu/thumbnailator,mecnet/thumbnailator,tmxdyf/thumbnailator,PandaCanFly/thumbnailator,AascisB/thumbnailator,gigaZhang/thumbnailator,indra7/thumbnailator,sinisterrook/thumbnailator,iFrankWu/thumbnailator,mystijk/thumbnailator