make boolean attributes html5 spec compatible #2169
make boolean attributes html5 spec compatible #2169

fergaldoyle/vue,shupan123/vue-fixed-type,th0r/vue,shupan123/vue-fixed-type,fergaldoyle/vue,diermengdierme/vue,fergaldoyle/vue,shupan123/vue-fixed-type,diermengdierme/vue,th0r/vue,th0r/vue,diermengdierme/vue