Replace `type_` with `type`

lib/client/models/search.dart

@@ -10,14 +10,15 @@ part 'search.g.dart';
 /// based on https://dev.lemmy.ml/docs/contributing_websocket_http_api.html#search
 @JsonSerializable(createToJson: false)
 class Search {
-  final String type_;
+  @JsonKey(name: "type_")
+  final String type;
   final List<CommentView> comments;
   final List<PostView> posts;
   final List<CommunityView> communities;
   final List<UserView> users;
 
   const Search({
-    this.type_,
+    this.type,
     this.comments,
     this.posts,
     this.communities,

lib/client/models/search.g.dart

@@ -8,7 +8,7 @@ part of 'search.dart';
 
 Search _$SearchFromJson(Map<String, dynamic> json) {
   return Search(
-    type_: json['type_'] as String,
+    type: json['type_'] as String,
     comments: (json['comments'] as List)
         ?.map((e) =>
             e == null ? null : CommentView.fromJson(e as Map<String, dynamic>))