update firebase version in example
update firebase version in example

Endika/vue,bsn069/vue,beni55/vue,kazupon/vue,nkovacs/vue,jhaesus/vue,zOxta/vue,lazarofl/vue,fergaldoyle/vue,diermengdierme/vue,jhaesus/vue,yuByte/vue,WQuanfeng/vue,likaiwalkman/vue,cuhuak/vue,haner199401/vue,elvinzhu/vue,nkovacs/vue,endaaman/vue,meiwenhui/vue,yuByte/vue,JsAaron/vue,VictorChaun/vue,cnbin/vue,KuroGuo/vue,fergaldoyle/vue,ke-pan/vue,JsAaron/vue,longjl/vue,diermengdierme/vue,VimVincent/vue,ke-pan/vue,coopsource/vue,meleslilijing/vue,echoZQ/vue,Endika/vue,knownasilya/vue,15521316173/vue,gold3bear/vue,elvinzhu/vue,gold3bear/vue,gxr1020/vue,galenyuan/vue,Alen-gao/vue,GloriaCHL/vue,seedalpha/vue,Suixinlei/vue,WQuanfeng/vue,jRoadie/vue,lepture/vue,shupan123/vue-fixed-type,lovewitty/vue,Alen-gao/vue,prosenjit-itobuz/vue,gxr1020/vue,jRoadie/vue,zOxta/vue,zsh2938/vue,yuche/vue,coopsource/vue,JosephSilber/vue,lepture/vue,PUSEN/vue,cgvarela/vue,rohmad-st/vue,zsh2938/vue,Iamlars/vue,Zeratul5/vue,mubassirhayat/vue,th0r/vue,r14r/fork_javascript_vue,longjl/vue,macroxing/vue,15521316173/vue,loki315zx/vue,th0r/vue,AtChina/vue,lishengzxc/vue,squallyan/vue,noyobo/vue,th0r/vue,jwdeitch/vue,lepture/vue,noyobo/vue,seedalpha/vue,knownasilya/vue,meiwenhui/vue,Endika/vue,cuhuak/vue,haner199401/vue,cheapsteak/vue,cgvarela/vue,Erane/vue,lazarofl/vue,yuche/vue,diermengdierme/vue,lishengzxc/vue,JosephSilber/vue,beni55/vue,jwdeitch/vue,Jonavin/vue,r14r/fork_javascript_vue,squallyan/vue,Zeratul5/vue,galenyuan/vue,PUSEN/vue,karevn/vue,GloriaCHL/vue,shupan123/vue-fixed-type,Iamlars/vue,karevn/vue,bsn069/vue,endaaman/vue,loki315zx/vue,karevn/vue,wangjun/vue,rohmad-st/vue,Jonavin/vue,Erane/vue,AtChina/vue,cheapsteak/vue,lovewitty/vue,macroxing/vue,fergaldoyle/vue,shupan123/vue-fixed-type,wangjun/vue,cnbin/vue,KuroGuo/vue,nfriend/vue,meleslilijing/vue,echoZQ/vue,Suixinlei/vue,kazupon/vue,VictorChaun/vue,seedalpha/vue,galenyuan/vue,prosenjit-itobuz/vue,VimVincent/vue,likaiwalkman/vue