Blender 3.0 support

[Almaz]

Your addon is great!
Blender version 3 is becoming more and more popular and relevant, you should take the time to make the addon fully compatible with it.
Please do not give up on developing your addon, it is an important part of the development of the Blender industry.
Thank you!

[slatoric]

blender-3.1.0-beta+v31.03b57d39731a-linux.x86_64-release after click to enable addon when installing it:
Traceback (most recent call last):
File "/home/user/dta/prg/blender-3.1.0-beta+v31.03b57d39731a-linux.x86_64-release/3.1/scripts/modules/addon_utils.py", line 387, in enable
mod.register()
File "/home/user/.config/blender/3.1/scripts/addons/screencast_keys/init.py", line 151, in register
bpy.utils.register_class(preferences.DisplayEventTextAliasProperties)
ValueError: register_class(...): already registered as a subclass 'DisplayEventTextAliasProperties'

blender-3.2.0-alpha+master.0b2864382a90-linux.x86_64-release after click to enable addon when installing it:
Traceback (most recent call last):
File "/home/user/dta/prg/blender-3.2.0-alpha+master.0b2864382a90-linux.x86_64-release/3.2/scripts/modules/addon_utils.py", line 387, in enable
mod.register()
File "/home/user/.config/blender/3.2/scripts/addons/screencast_keys/init.py", line 154, in register
utils.bl_class_registry.BlClassRegistry.register()
File "/home/user/.config/blender/3.2/scripts/addons/screencast_keys/utils/bl_class_registry.py", line 63, in register
bpy.utils.register_class(class_["class"])
ValueError: bpy_struct "SK_Preferences" registration error: 'font_size' IntProperty could not register (see previous error)

blender-3.0.1-linux-x64 - no problem.

Of course, those was unstable versions, but maybe it will be helpful...

[nutti]

This issue has already fixed.
Please see #73 and try the workaround.

[slatoric]

Thank you very much! (Previously I used version 3.6) Even tried to use Screenkey 1.4...