[RELEASE] -  publish version:  '1.4.2'.
[RELEASE] -  publish version:  '1.4.2'.

srijs/zipkin,coursera/zipkin,jstanier/zipkin,Yelp/zipkin,gneokleo/zipkin,Yelp/zipkin,wuqiangxjtu/zipkin,betable/zipkin,srijs/zipkin,thelastpickle/zipkin,gneokleo/zipkin,rjbhewei/zipkin,wuqiangxjtu/zipkin,srijs/zipkin,jfeltesse-mdsol/zipkin,prat0318/zipkin,betable/zipkin,rocwzp/zipkin,mzagar/zipkin,mzagar/zipkin,jstanier/zipkin,lqjack/zipkin,gneokleo/zipkin,thelastpickle/zipkin,prat0318/zipkin,betable/zipkin,Yelp/zipkin,jfeltesse-mdsol/zipkin,rocwzp/zipkin,rjbhewei/zipkin,rjbhewei/zipkin,prat0318/zipkin,Yelp/zipkin,wuqiangxjtu/zipkin,prat0318/zipkin,lqjack/zipkin,mzagar/zipkin,betable/zipkin,rjbhewei/zipkin,lqjack/zipkin,wuqiangxjtu/zipkin,thelastpickle/zipkin,rocwzp/zipkin,mzagar/zipkin,rocwzp/zipkin,jstanier/zipkin,jstanier/zipkin,jfeltesse-mdsol/zipkin,thelastpickle/zipkin,gneokleo/zipkin,jfeltesse-mdsol/zipkin,lqjack/zipkin,coursera/zipkin,srijs/zipkin,coursera/zipkin,coursera/zipkin