fix: json serializable version (#397)

Author: budde377

packages/graphql_codegen/pubspec.lock

@@ -378,10 +378,10 @@ packages:
     dependency: "direct dev"
     description:
       name: json_serializable
-      sha256: b0a98230538fe5d0b60a22fb6bf1b6cb03471b53e3324ff6069c591679dd59c9
+      sha256: c50ef5fc083d5b5e12eef489503ba3bf5ccc899e487d691584699b4bdefeea8c
       url: "https://pub.dev"
     source: hosted
-    version: "6.9.3"
+    version: "6.9.5"
   lints:
     dependency: "direct dev"
     description:

packages/graphql_codegen/pubspec.yaml

@@ -25,6 +25,6 @@ dev_dependencies:
   test: ^1.17.4
   build_test: ^2.1.0
   build_runner: ^2.0.3
-  json_serializable: ^6.1.5
+  json_serializable: ^6.9.5
   graphql: ^5.2.0-beta.3
   lints: ^5.1.1