Vue Composition Converter

Convert optionsAPI into composition API

Forked from https://github.com/miyaoka/vue-composition-converter

convert options into `setup`

data, computed, watch, methods, lifecycle, props -> setup()
- data -> ref()
- computed -> computed()
- watch -> watch()
- methods -> function
- lifecycle -> lifecycle hooks
  - beforeCreate, created -> Immediate function
- props -> toRefs()

convert `this`

this.prop
- (toRefs, ref, computed) -> prop.value
- (other) -> prop
this.$globalProp -> ctx.root.$globalProp