Would it be possible to relax RingSender::send's &mut self to &self?

[jesdazrez]

Hi there!, first of all thanks for the cool library :)
I was taking a quick look at the src of the send function and wondered if the mutable self reference is actually needed?

For additional context, I'm trying to use the RingSender in a closure that must implement Fn.

[brunocodutra]

Good question, I can't think of a reason why it couldn't take &self.

[brunocodutra]

@jesdazrez I've just released this change on v0.12.

[jesdazrez]

thanks a lot @brunocodutra!