Describe the bug

When an option is optional, the completion label is missing the ?

Svelte Language Server	vtsls

Reproduction

function foo(options: { bar: boolean; baz?: number }) {}
foo({ bar: false,   })
//                       ?^ See completions here 

Expected behaviour

The label returned by the language server has a ? when it's optional

System Info

n/a

Which package is the issue about?

svelte-language-server

Additional Information, eg. Screenshots

No response