enhanced_change_notifier 0.2.1

A enhanced version of ChangeNotifier introduces new features `target`, `once`, and `immediate`.

0.2.1

• Feature #1: Introduce EnhancedLatchNotifier listener.
• Feature #2: Introduce ValueCallback listener.

0.2.0

• Feature #1: Introduce PropertyValueCallback listener.
• Feature #2: Override hasListners of ChangeNotifier to check if there are any listeners.

0.1.7

• Feature #1: Introduce EnhancedValueNotifier holds a single value.
• Feature #2: Introduce Signal buffers pipelined listener pending a release signal.
• Feature #3: Introduce PropertyCallback listener.

0.1.6

• README tuned

0.1.5

• tiny code optimization

0.1.4

• tiny code optimization

0.1.3

• tiny code optimization

0.1.2

• tiny code optimization

0.1.1

• Bug fixed #1: target listener supports VoidCallback and PropertyCallback.

0.1.0

• Feature #1: Support target once immediate for EnhancedChangeNotifier.
• Feature #2: GlobalFactory Class helps create a global singleton instance.