v6.4.0

• LibPDF417 is now fully ProGuard-compatible, i.e. you no longer need to exclude com.microblink.** classes in your ProGuard configuration
• removed support for Android 2.3 and Android 4.0 - minimum required Android version is now Android 4.1 (API level 16)
  • devices with Android 4.0 and earlier take less than 2% of market share and is very costly to support them
• removed support for armeabi devices and ARMv7 devices without NEON SIMD support
  • support for ARMv7 devices with NEON support still remains