v0.12.1

[Nazariglez]

• Updated EGUI to 0.27. #322 #323
• The readme has gifs again. #317
• Added app.mouse.clean_button_state to clean the state of a button. 294c9b4d5fce9a87acbc7a5c0b6e142bf7ca94c7
• Added xtask to run project's script like building the examples for web. #314 #321
• Fixed an issue with EGUI that makes text looks blurry. #324

Thanks @mantasarm, @Rzial, and @apekros!