Fix tests for NJsonSchema 11 (#19) (#2291)

Author: rayokota

src/Confluent.SchemaRegistry.Serdes.Json/Confluent.SchemaRegistry.Serdes.Json.csproj

@@ -24,7 +24,7 @@
   </PropertyGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net8.0' ">
-    <PackageReference Include="NJsonSchema.NewtonsoftJson" Version="11.0.1" />
+    <PackageReference Include="NJsonSchema.NewtonsoftJson" Version="11.0.2" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' != 'net8.0' ">

src/Confluent.SchemaRegistry.Serdes.Json/JsonSerializer.cs

@@ -100,8 +100,13 @@ public JsonSerializer(ISchemaRegistryClient schemaRegistryClient, JsonSerializer
             this.jsonSchemaGeneratorSettings = jsonSchemaGeneratorSettings;
 
             this.schema = this.jsonSchemaGeneratorSettings == null
+#if NET8_0_OR_GREATER
+                ? NewtonsoftJsonSchemaGenerator.FromType<T>()
+                : NewtonsoftJsonSchemaGenerator.FromType<T>(this.jsonSchemaGeneratorSettings);
+#else
                 ? JsonSchema.FromType<T>()
                 : JsonSchema.FromType<T>(this.jsonSchemaGeneratorSettings);
+#endif
             this.schemaText = schema.ToJson();
             this.schemaFullname = schema.Title;
 
@@ -185,7 +190,7 @@ public JsonSerializer(ISchemaRegistryClient schemaRegistryClient, Schema schema,
         ///     Context relevant to the serialize operation.
         /// </param>
         /// <returns>
-        ///     A <see cref="System.Threading.Tasks.Task" /> that completes with 
+        ///     A <see cref="System.Threading.Tasks.Task" /> that completes with
         ///     <paramref name="value" /> serialized as a byte array.
         /// </returns>
         public override async Task<byte[]> SerializeAsync(T value, SerializationContext context)