`18446744073709551615` (`0xFFFFFFFFFFFFFFFF`) is an overflow to the JS
numerical system and therefore incorrect. Integer values from `-(2^53-1)` to `(2^53-1)`
only can be safely represented in JS (`Number.MIN_SAFE_INTEGER` to
`Number.MAX_SAFE_INTEGER`)
There's a fix in iOS Runtime's metadata generator which now automatically
converts such values to signed. (https://github.com/NativeScript/ios-runtime/pull/1151)
refs https://github.com/NativeScript/ios-runtime/issues/1150