5.0.1

• Added method to observe notyfing state change for the characteristic (#229)
• Aligned the API for establishConnection with the rest of the implementation
• Made restore state api public (#224)
• Enabled getting an Observable<Peripheral> from already connected peripheral provided by the system (#238)
• Fixed writting without response on older systems (#241)
• Added queues for discovery requests (fixed #235)
• Added support for XCode 9.3 and swift 4.1