- null safety
- android support usb flutter_usb_printer
- windows support usb using win32
- hotfix
- add isDisconnect parameter to writeBytes
- upgrade esc_pos_utils_plus
- hotfix ConntectionType to ConnectionType
- ios bluetooth ble support
- hotfix
- license public added
- BluetoothPrinterManager allow to scan bluetooth paired printer device, connect, writeBytes
- NetworkPrinterManager allow to scan network printer device, connect, writeBytes