update auth server version and fix failing tests

Author: dshukertjr

infra/gotrue/docker-compose.yml

@@ -2,7 +2,7 @@
 version: '3'
 services:
   gotrue: # Signup enabled, autoconfirm on
-    image: supabase/gotrue:v2.146.0
+    image: supabase/auth:v2.151.0
     ports:
       - '9998:9998'
     environment:

packages/gotrue/test/api_version_test.dart

@@ -12,7 +12,7 @@ void main() {
       });
       final version = ApiVersion.fromResponse(response);
       expect(version?.name, validHeader);
-      expect(version?.timestamp, DateTime(2024, 1, 1));
+      expect(version?.timestamp, DateTime.parse('2024-01-01 00:00:00.000Z'));
     });
 
     test('should return null object for invalid header', () {