[next] v-on test (#2741)
[next] v-on test (#2741)

* ensure babel-env during build

* v-on test

* fixed build script

greennyreborn/vue,xueyaodeai/vue,lizhiyao/vue,Jinjiang/vue,Ddder-FE/vue,posva/vue,lizhiyao/vue,vuejs/vue,leemotive/vue,posva/vue,gebilaoxiong/vue,posva/vue,Jinjiang/vue,hanhongyuan/vue,Kingwl/vue,pramudaprakash/GITHUB,KingMario/vue,xueyaodeai/vue,leemotive/vue,Hanks10100/vue,hanhongyuan/vue,pramudaprakash/GITHUB,wushuyi/vue,hanhongyuan/vue,sreesirisha/GITMidtermexam,posva/vue,wushuyi/vue,cnchanning/vue,leemotive/vue,KingMario/vue,hanhongyuan/vue,greennyreborn/vue,gebilaoxiong/vue,Kingwl/vue,cnchanning/vue,Hanks10100/vue,Kingwl/vue,greennyreborn/vue,optimizely/vue,Ddder-FE/vue,Kingwl/vue,leemotive/vue,Jinjiang/vue,Hanks10100/vue,sreesirisha/GITMidtermexam,Jinjiang/vue,KingMario/vue,sreesirisha/GITMidtermexam,greennyreborn/vue,lizhiyao/vue,lizhiyao/vue,gebilaoxiong/vue,Ddder-FE/vue,Hanks10100/vue,xueyaodeai/vue,sreesirisha/GITMidtermexam,cnchanning/vue,xueyaodeai/vue,pramudaprakash/GITHUB,vuejs/vue,KingMario/vue,Ddder-FE/vue,pramudaprakash/GITHUB,vuejs/vue,vuejs/vue