Allow analyzer >=9 and build >=4, Freezed 3.2.3 incompatible with json_serializable 6.11.3

[MiniSuperDev]

Hi,

Several packages, like the following now support analyzer >=9 and build >=4

• source_gen: https://github.com/dart-lang/source_gen/blob/3c0fca3f1d2f180088af664aea78dd69def8899b/source_gen/pubspec.yaml
• json_serializable: https://github.com/google/json_serializable.dart/blob/cf786443b3485d9d9cffdf5941a344550f5f0584/json_serializable/pubspec.yaml
• built_value_generator: https://github.com/google/built_value.dart/blob/fb35e5d93ac54ca6e1107d585a2af441ff211e5d/built_value_generator/pubspec.yaml

Resolving dependencies... 
Because json_serializable >=6.11.3 depends on analyzer ^9.0.0 and
  freezed 3.2.3 depends on analyzer >=7.5.9 <9.0.0, json_serializable
  >=6.11.3 is incompatible with freezed 3.2.3.
And because no versions of freezed match >3.2.3 <4.0.0,
  json_serializable >=6.11.3 is incompatible with freezed ^3.2.3.
So, because temp_freezed_and_json_serializable_1 depends on both
  freezed ^3.2.3 and json_serializable ^6.11.3, version solving failed.

name: freezed_bug
description: "A new Flutter project."
publish_to: "none"
version: 0.1.0

environment:
  sdk: ^3.10.0

dependencies:
  flutter:
    sdk: flutter
  freezed_annotation: ^3.1.0
  json_annotation: ^4.9.0

dev_dependencies:
  flutter_test:
    sdk: flutter
  flutter_lints: ^6.0.0
  build_runner: ^2.10.4
  freezed: ^3.2.3
  json_serializable: ^6.11.3

flutter:
  uses-material-design: true