Supporte latest godot 3.5 version, closes #8

[bugfis] fix tint color effect with only amount definition

[feature] implement 'animation_completed' signal

[ci] fix pathes while preparing assets

[ci] fix pathes while preparing assets

[ci] fix uploading release assets

[ci] figure out how to upload multiply release assets

[ci] implement release

[ci] fix worflows syntax

[ci] setup windows & osx builders as well