Replace RefCell<bool> with Cell<bool>
Replace RefCell<bool> with Cell<bool>

neon-bindings/neon,neon-bindings/neon,dherman/nanny,rustbridge/neon,rustbridge/neon,dherman/nanny,rustbridge/neon,dherman/nanny,dherman/nanny,neon-bindings/neon,rustbridge/neon,neon-bindings/neon,rustbridge/neon,rustbridge/neon