Vue.js 1.0.12 发布，更新如下：
新增
新的prop选项: coerce
你现在可以给prop定义一个coerce函数 - 每当prop在父类更新的时候，prop的值将会通过coerce函数。你可以将它理解为prop的单向过滤器，只是他被定义在了子类组件内。
修复
#2001 fix IE9 class merging with both class and :class during transclusion
#2015 handle 0 properly when using v-bind for input value
#2017 prevent v-model syncing value on blur after fragment is removed
#2021 improve template parser when parsing plain strings containing HTML entities
#2022 fix v-show stuck when it is compiled on out-of-dom element
#2023 avoid v-model attempting to sync value after debounce when it is already unbound
#2026 fix v-pre error when used on component root node
#2028 avoid debounce on blur for v-model
#2035 fix SVG class interpolation regression
#2036 non-deep watchers now fire properly when an object's structure has been changed byVue.set or Vue.delete.
#2042 fix v-bind when binding muted attribute on
