Update to new XCode/Swift?

[StealthRT]

Mike I can not seem to find an email address for you so apologies for having to put a bug report in order to get in touch with you.

I am just wondering if it would be too much to ask if you could update the iOS code for this? I've been trying to work with it in XCode 13.3 and Swift 4+ and I have a few errors due to Swift being less than version 4 among other obsolete code here and there.

Currently when starting the app I get this error:
initCentral
self.peripheralManager powered on.
Scanning started
2022-06-12 20:40:23.324326-0400 BLEMingleiOS[9295:2057090] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSTaggedPointerString substringWithRange:]: Range {4, 4} out of bounds; string length 3'

That looks to be in the AppDelegate.swift file line 14.

Thanks! @gitgarage @omikes