Fix disconnect when using the winrt backend.

[TristonJ]

Fixes #300

You must explicitly disconnect from each service before disconnecting from the device. Otherwise, Windows does not seem to fully disconnect the device internally.

See https://stackoverflow.com/questions/39599252/windows-ble-uwp-disconnect for similar issues.

I did this by simply adding a list of services to the BLEDevice when discover_services is called, allowing us to Close them when the device is dropped. This appears to work in my use-case, but I'd be interested to see if it's a robust enough solution for other folks.

[thewh1teagle]

Thank you very much!
I can confirm this worked for me in windows 11
in cargo.toml:

btleplug = { git = "https://github.com/TristonJ/btleplug.git", rev = "d90009d0509eb58677b4f106b48b650dd4e13347" }

[qdot]

Yeah, I think this is fair. Weird that we have to do it, but better than basically leaking live connections.