fix(reactivity): clear on readonly collections return undefined

[wsypower]

clear on readonly collections return the proxy

const warp = readonly(new Map())
console.log(warp.clear() === warp)  // true

This fix now return undefined

const warp = readonly(new Map())
console.log(warp.clear())  // undefined

[wsypower]

currently, only the return value of the clear method is different from the rules of Map and Set.

const readonlyMap = readonly(new Map())
console.log('size',readonlyMap.size) // 0
console.log('get',readonlyMap.get('key')) // undefined
console.log('set',readonlyMap.set('key',2)) // readonlyMap
console.log('has',readonlyMap.has('key')) // false
console.log('delete',readonlyMap.delete('key')) // false
console.log('clear',readonlyMap.clear()) // readonlyMap

or was it designed this way on purpose?

[PraveenNanda124]

Looks good

[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	86.4 kB (+21 B)	32.9 kB (+7 B)	29.7 kB (+20 B)
vue.global.prod.js	132 kB (+21 B)	49.6 kB (+6 B)	44.5 kB (+21 B)

Usages

Name	Size	Gzip	Brotli
createApp	48 kB (+21 B)	18.9 kB (+7 B)	17.2 kB (-46 B)
createSSRApp	51.2 kB (+21 B)	20.2 kB (+7 B)	18.4 kB (+9 B)
defineCustomElement	50.3 kB (+21 B)	19.7 kB (+7 B)	17.9 kB (-3 B)
overall	61.3 kB (+21 B)	23.7 kB (+7 B)	21.6 kB (+4 B)