fix(runtime-vapor): the effect being collected in the wrong scope

[Jevon617]

See this, delete input box content, msg.length === 3 not updated, because the constructor of ReactiveEffect is run before scope.on.

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Size Report

Bundles

File	Size	Gzip	Brotli
compiler-dom.global.prod.js	80 kB	28.1 kB	24.7 kB
compiler-vapor.global.prod.js	49 kB	16.7 kB	15.1 kB
runtime-dom.global.prod.js	94.5 kB	35.6 kB	32 kB
runtime-vapor.global.prod.js	42 kB (-6 B)	15.6 kB	14.3 kB (-1 B)
vue-vapor.global.prod.js	88.5 kB (-6 B)	30.9 kB (+1 B)	28 kB
vue.global.prod.js	152 kB	54.9 kB	49 kB

Usages

Name	Size	Gzip	Brotli
createApp	54.8 kB	21 kB	19.2 kB
createSSRApp	58.1 kB	22.3 kB	20.4 kB
defineCustomElement	57.1 kB	21.8 kB	19.9 kB
vapor	42.3 kB (-6 B)	15.7 kB (-1 B)	14.4 kB (+3 B)
overall	68.5 kB	26.1 kB	23.6 kB

[LittleSound]

Fixed in #174