Update to change DendencyConfig identity method to member hashing.

This also paves the way to a future enhancement where dependency type aliases utilise the hash instead of an incrementing int - which will make them stable across changes to the dependency list

injectable_generator/lib/code_builder/builder_utils.dart

@@ -93,7 +93,7 @@ extension _InjectedDependencyX on InjectedDependency {
 @visibleForTesting
 Set<DependencyConfig> sortDependencies(Iterable<DependencyConfig> it) {
   // sort dependencies alphabetically by all the various attributes that may make them unique
-  final deps = it.toList()..sortBy((e) => e.toString());
+  final deps = it.toList()..sortBy<num>((e) => e.identityHash);
   // sort dependencies by their register order
   final List<DependencyConfig> sorted = [];
   _sortByDependents(deps, sorted);

injectable_generator/lib/models/dependency_config.dart

@@ -32,7 +32,7 @@ class DependencyConfig {
   final int orderPosition;
   final String? scope;
 
-  const DependencyConfig({
+  DependencyConfig({
     required this.type,
     required this.typeImpl,
     this.injectableType = InjectableType.factory,
@@ -144,6 +144,16 @@ class DependencyConfig {
       postConstructReturnsSelf.hashCode ^
       scope.hashCode;
 
+ late final int identityHash = type.identity.hashCode ^
+     typeImpl.identity.hashCode ^
+     injectableType.hashCode ^
+     instanceName.hashCode ^
+     orderPosition.hashCode ^
+     scope.hashCode ^
+     const ListEquality().hash(dependencies) ^
+     const ListEquality().hash(dependsOn) ^
+     const ListEquality().hash(environments);
+
   factory DependencyConfig.fromJson(Map<dynamic, dynamic> json) {
     ModuleConfig? moduleConfig;
     DisposeFunctionConfig? disposeFunction;