Null Safety + GradientCircularProgressIndicator

• GradientCircularProgressIndicator
• Null Safety

`Key`s for widgets

0.5.2

Keys for widgets

`GradientButton` is not clickable when it is not enabled

• GradientButton is not clickable when it is not enabled (isEnabled = false)
• Merging #12

shadowColor for cards and buttons

• shadowColor for GradientCard, GradientButton and CircularGradientButton
• All gradient widgets now have default gradients
• Fixing GradientCard's shape bug

Bug fixes

• CircularGradientButton elevation was not initialized from initState
• GradientButton animation controller was not disposed from onDispose

Animating gradient buttons on taps

Gradient buttons (CircularGradientButton and GradientButton) reacting (animating) to tap gestures (normal, up and down)

adding GradientProgressIndicator

0.3.1

• fixing compiler warning about setting 0.0 to doubles

0.3.0

• GradientProgressIndicator