v0.4.0

• Minor fixes and performance improvements
• Adds indicatorBorderRadius to AnimatedToggleSwitch
• Adds animationOffset, clipAnimation and opacityAnimation to AnimatedToggleSwitch.dual
• BREAKING: Sets default values of animationOffset, clipAnimation and opacityAnimation
  in AnimatedToggleSwitch.dual
• BREAKING: Renames foregroundBorder to indicatorBorder