fix(compiler-sfc): initialize scope with null prototype object

[KazariEX]

Prevent mistakenly identifying properties such as toString inherited from Object as props.

[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	101 kB	37.9 kB	34.1 kB
vue.global.prod.js	159 kB	57.9 kB	51.4 kB

Usages

Name	Size	Gzip	Brotli
createApp (CAPI only)	48.8 kB	18.8 kB	17.2 kB
createApp	55.4 kB	21.3 kB	19.4 kB
createSSRApp	59.4 kB	23 kB	21 kB
defineCustomElement	60.2 kB	22.9 kB	20.9 kB
overall	69.1 kB	26.4 kB	24 kB

[pkg-pr-new]

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@vue/compiler-core

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@vue/compiler-dom

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@vue/compiler-ssr

pnpm add https://pkg.pr.new/@vue/compiler-ssr@11963

@vue/reactivity

pnpm add https://pkg.pr.new/@vue/reactivity@11963

@vue/runtime-dom

pnpm add https://pkg.pr.new/@vue/runtime-dom@11963

@vue/runtime-core

pnpm add https://pkg.pr.new/@vue/runtime-core@11963

@vue/server-renderer

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@vue/shared

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@vue/compat

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vue

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@vue/compiler-sfc

pnpm add https://pkg.pr.new/@vue/compiler-sfc@11963

commit: 71a2db4