fix(component-meta): error when signatures is undefined

[Hannesrasmussen]

In certain cases, signatures[0].parameters[0] returns undefined. We need to prevent this from causing an error.

[pkg-pr-new]

Open in Stackblitz

vue-component-meta

pnpm add https://pkg.pr.new/vuejs/language-tools/vue-component-meta@4930

vue-component-type-helpers

pnpm add https://pkg.pr.new/vuejs/language-tools/vue-component-type-helpers@4930

@vue/language-core

pnpm add https://pkg.pr.new/vuejs/language-tools/@vue/language-core@4930

@vue/language-plugin-pug

pnpm add https://pkg.pr.new/vuejs/language-tools/@vue/language-plugin-pug@4930

@vue/language-service

pnpm add https://pkg.pr.new/vuejs/language-tools/@vue/language-service@4930

@vue/language-server

pnpm add https://pkg.pr.new/vuejs/language-tools/@vue/language-server@4930

vue-tsc

pnpm add https://pkg.pr.new/vuejs/language-tools/vue-tsc@4930

@vue/typescript-plugin

pnpm add https://pkg.pr.new/vuejs/language-tools/@vue/typescript-plugin@4930

commit: e321381