BREAKING CHANGE: The type of `defineComponent()` when passing in a function has changed. This overload signature is rarely used in practice and the breakage will be minimal, so repurposing it to something more useful should be worth it.
close#3102
- No longer implicitly register global JSX types by default
- This avoid conflict when using Vue in the same project with React
- Global registration must now be done by explicitly importing /
referencing `vue/jsx`, or listing it in `compilerOptions.types`.
- Add `vue/jsx-runtime` to support `jsxImportSource` usage
- Can enable globally by setting `compilerOptions.jsxImportSource` to `'vue'`
- Can also opt-in per-file with `/** @jsxImportSource vue */`