⭐️New: Add vue/no-unsupported-features rule

[ota-meshi]

vue/no-unsupported-features rule reports unsupported Vue.js syntax on the specified version.

This rule checks the following syntaxes.

• Vue.js 2.6.0+
  • dynamic directive arguments.
  • v-slot directive.
• Vue.js 2.5.0+
  • slot-scope attributes.
• Vue.js ">=2.6.0-beta.1 <=2.6.0-beta.3" or 2.6 custom build
  • v-bind with .prop modifier shorthand. A short syntax for v-bind .prop modifier vue#7582
    https://github.com/vuejs/vue/blob/dev/scripts/feature-flags.js#L3

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refs #800 (comment)