0.4.9

• For normal operation on new versions of Python, it was decided to stop supporting Python below 3.9 version
• Fixed a bug in working with OpenCV that led to incorrect display of frames and recognition of pressed keys (When using new versions of opencv+python)
• Added vertical & horizontal alignment of the keys
• Added the ability to set the number of keys
• Added the ability to move the selected key by 1 pixel along each axis by pressing on Numpad 4,6,8,2.