[Suggestion] remove dynamic input type warning

[HerringtonDarkholme]

Tell us about your environment

• ESLint Version: 4.0.0
• eslint-plugin-vue Version: 3.14.0
• Node Version: 8.5.0

vuejs/vue@f3fe012

Vue 2.5 has already supported dynamic input type.

It seems v-model dynamic type check isn't needed any more.

https://github.com/vuejs/eslint-plugin-vue/blob/master/lib/rules/valid-v-model.js#L97-L104

[michalsnik]

Thanks for pointing this @HerringtonDarkholme We're definitely going to update this rule :)