Completion fails if function is optional

[haxiomic]

If a function has @:optional metadata, completion fails for that type. In the following example, there will be no completion for example, but if you remove @:optional, completion works.

class Main {
    
    static function main() {
        var example: {
            function test(): Void;
            @:optional
            function optionalTest(): Void;
        } = null;

        example.|
    }

}

I had a similar bug in my sublime plugin – I assumed if kind is 'method', then type will be a function signature, however the function signature is wrapped in Null<T> so it fails to parse as a function. I.e., the type returned from haxe --display of the method optionalTest() is Null<Void -> Void, which doesn't parse as a function signature

[haxiomic]

Seems to be happening again in v2.21.0

[Gama11]

Looks like the fix for #449 covers this too.

[haxiomic]

Awesome stuff! Thanks @Gama11 ❤️