• [IMPROVEMENT] Raises targetSdkVersion to API 27 - it is still possible to target API 24 and above with a Gradle ResolutionStrategy (see example in build.gradle)
• [IMPROVEMENT] Removes unnecessary READ_PHONE_STATE permission
• [FIXED] A compilation problem highlighted in issue #32 - Workaround described there is no longer necessary
• [FIXED] A crash that can occur when establishing a Bluetooth connection with the card reader
• [API CHANGE] Removes fields and methods deprecated in previous versions