IOS os_version should give specific version number

**Is your feature request related to a problem? Please describe.**
On an IPhone or IPad the os_version is simply "iOS" or sometimes "unknown"

**Describe the solution you'd like**
It should give the ios version, 16.0.0 etc..

**Describe alternatives you've considered**
I looked at alternative libraries that give the version number correctly, but would rather stick with this one.