Add helpful error when using select_tag with an attribute

[paulcsmith]

https://gitter.im/luckyframework/Lobby?at=5e635af4afdc1e2033d6540a

The error isn’t helpful so we should have a more helpful one saying to use select_input with an attribute

[jwoertink]

lol https://github.com/luckyframework/lucky/issues/985

[matthewmcgarvey]

I think it's just a matter of adding a type signature to the options parameter https://github.com/luckyframework/lucky/blob/8d7bb5702d92e233c90ae29f743c7780450501af/src/lucky/tags/base_tags.cr#L167-L169

The default arg is Hash(String, String) but I'm not entirely sure if that is always how people use it