0.7.0

• Animated containers are more optimized;
• Stricter rules have been applied to constructors (AnimatedSwitcher, AnimatedContainer, AnimatedThemeSwitcher, ...) regarding null animations, that aren't accepted now;
• Added the Animation.none() method (equivalent to new Animation(null) to represent a non-animation;
• Implemented PropertyWrapper#registerAnimation as a preferred alternative to new AnimationProperty(propertyWrapper).register().