1.5.2

Changed

• Raised the compatibility with Android API level from 26+ (Android 8.0) to 21+ (Android 5.0).
• SystemChecker's benchmark tools returns a prototype of the function and the real elapsed time (#23)

Fixed

• Argon2 was not using the given pepper with Password.check(String, Hash).
• Salt was converted from String to byte[] too many times. (#31).

Removed

• Dependency with Apache Commons Text.