adjust/unity_sdk v4.12.4

Version 4.12.4

on GitHub

Fixed

• Fixed JNI exception occurences upon triggering session/event failure callbacks when Performance Reporting is turned ON while building Android app (#126).
• Changed target platform for iOS source files and static library to iOS only (#128).

Native versions:

• iOS@v4.12.3
• Android@v4.12.4
• Windows@4.12.0

Pull Request #129