How can I get `Hash` value via a `Symbol` key?

[zhuangsirui]

I read the doc, use Hash.Get to access values, but I can't find a way to convert to Symbol.

[erikh]

Hi!

So I don't think the library has support for this yet, but I don't think it'll be complicated to add; basically we need a new value type called Symbol that MrbValue()'s with C.mrb_intern_cstr. This should yield the values necessary to populate the hash table, or use symbols in any other context.

It might take me a few weeks to free up time but i can do this patch soon.