vue-reactivity-with-polyfill

@vue/reactivity can not support no Proxy envs, this pkg ployfill it.

• Use proxy-polyfill
• Use core-js

New API

• get(target, path, defaultValue)
• set(target, key, val)
• del(target, key)
• getLength(target: ArrayLike)

Unsupported Cases

• Symbol key
• Array length
• Dynamic prop, object[key] or array[index]
• delete
• objectSpread

More, see proxy-polyfill