fix SVG class manipulation in PhantomJS
fix SVG class manipulation in PhantomJS

Endika/vue,karevn/vue,galenyuan/vue,lepture/vue,karevn/vue,seedalpha/vue,Endika/vue,lepture/vue,diermengdierme/vue,diermengdierme/vue,shupan123/vue-fixed-type,galenyuan/vue,fergaldoyle/vue,th0r/vue,fergaldoyle/vue,karevn/vue,lepture/vue,seedalpha/vue,seedalpha/vue,th0r/vue,fergaldoyle/vue,th0r/vue,diermengdierme/vue,shupan123/vue-fixed-type,shupan123/vue-fixed-type,Endika/vue,galenyuan/vue