copy_with_extension 1.1.0

Annotation for generating `copyWith` extensions code using `copy_with_extension_gen`.

1.1.0 Extension name fix

• Introducing the copyWithNull function.

1.0.7 Extension name fix

• Creates a unique extension name for each class.

1.0.6 Minor corrections

• Minor metadata and description corractions.

1.0.0 Initial release

• Lets you annotate an object using @CopyWith() to generate a copyWith extension.