Ucom POS Printer SDK Demo

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Version 1.4.2
- Bug fix
- Added several printer results
- Filtered unknown USB profile

Version 1.4.0
- Bug fix
- Added alignment to print QR code

Version 1.3.6
- Added support to check printer connection for specific printer firmware

Version 1.3.5
- Fixed a bug about re-connection
- Ucom Printer Manager now supports USB interface

Version 1.3.0
- Added support to printer model PO-PUD76E