fix(language-core): generate camelized prop name for defineModel

[KazariEX]

fix vuejs/core#12532

[pkg-pr-new]

Open in Stackblitz

vue-component-meta

npm i https://pkg.pr.new/vuejs/language-tools/vue-component-meta@5213

vue-component-type-helpers

npm i https://pkg.pr.new/vuejs/language-tools/vue-component-type-helpers@5213

@vue/language-plugin-pug

npm i https://pkg.pr.new/vuejs/language-tools/@vue/language-plugin-pug@5213

@vue/language-server

npm i https://pkg.pr.new/vuejs/language-tools/@vue/language-server@5213

@vue/language-service

npm i https://pkg.pr.new/vuejs/language-tools/@vue/language-service@5213

@vue/language-core

npm i https://pkg.pr.new/vuejs/language-tools/@vue/language-core@5213

vue-tsc

npm i https://pkg.pr.new/vuejs/language-tools/vue-tsc@5213

@vue/typescript-plugin

npm i https://pkg.pr.new/vuejs/language-tools/@vue/typescript-plugin@5213

commit: 64bb606