Copy with field support

• Updating analyzer to >=2.0.0 <4.0.0
• Named constructor support.
• Better error reporting.
• Introduction of the new copyWith function with nullability support. The default behaviour of this library assumes that this function is used as follows: myInstance.copyWith.value("newValue"). The old functionality is still available.
• BREAKING generateCopyWithNull is renamed to copyWithNull.

Dependency update

Updating analyzer to ^2.0.0

Bugfix

Fix generation of generics with nullable types (thanks @josiahsrc).

Updating dependencies for null safety

Source gen version bump (#35)

* readme update

* source_gen and build versions bump

* Update run_tests.yml

Null safety

2.0.0

Improving Generic Compatibility

Fixes issue with generating code for some classes with generic type parameters.

Immutable fields

Merge pull request #17 from numen31337/update_1.3.0

Update 1.3.0

Introducing Generic Types Supports

1.2.0

metadata

Introducing copyWithNull

Introducing the copyWithNull function.

Analyzer rules

1.0.8

tests and dependencies correction