Prepare to release v4.1.0 of json_serializable (#844)

Author: kevmoo

json_serializable/CHANGELOG.md

@@ -1,4 +1,4 @@
-## 4.1.0-dev
+## 4.1.0
 
 - Implementation is now null-safe.
 - Correctly handle nullable generic fields (`T?`) with

json_serializable/pubspec.yaml

@@ -1,12 +1,10 @@
 name: json_serializable
-version: 4.1.0-dev
+version: 4.1.0
 description: >-
   Automatically generate code for converting to and from JSON by annotating
   Dart classes.
 repository: https://github.com/google/json_serializable.dart/tree/master/json_serializable
 environment:
-  # Keeping this <2.12.0 because the code is not null safe – yet!
-  # https://github.com/google/json_serializable.dart/issues/821
   sdk: '>=2.12.0 <3.0.0'
 
 dependencies:
@@ -17,8 +15,6 @@ dependencies:
 
   # Use a tight version constraint to ensure that a constraint on
   # `json_annotation` properly constrains all features it provides.
-  # For v3 only – allow a wide range since the only change was to REMOVE things
-  # from json_annotation
   json_annotation: '>=4.0.1 <4.1.0'
   meta: ^1.3.0
   path: ^1.8.0
@@ -34,7 +30,3 @@ dev_dependencies:
   stack_trace: ^1.10.0
   test: ^1.16.0
   yaml: ^3.0.0
-
-dependency_overrides:
-  json_annotation:
-    path: ../json_annotation