Add `Version.swift` to `project.pbxproj`
Add `Version.swift` to `project.pbxproj`

Fixes:
> error: use of unresolved identifier 'Version'
>        print(Version.current.value)
>              ^~~~~~~

jpsim/SourceKitten,jpsim/SourceKitten,jpsim/SourceKitten,jpsim/SourceKitten,jpsim/SourceKitten