add default serializer for AppVersion

Pilz.Updating/AppVersion.cs

@@ -1,7 +1,9 @@
 using Newtonsoft.Json;
+using Pilz.Updating.Json;
 
 namespace Pilz.Updating;
 
+[JsonConverter(typeof(AppVersionStringJsonConverter))]
 public class AppVersion(Version version, int build, Channels channel)
 {
     // P r o p e r t i e s

Pilz.Updating/Json/AppVersionStringJsonConverter.cs

@@ -3,8 +3,12 @@ using Newtonsoft.Json.Linq;
 
 namespace Pilz.Updating.Json;
 
-public class AppVersionStringJsonConverter : JsonConverter
+public class AppVersionStringJsonConverter(bool serializeAsObject) : JsonConverter
 {
+    public AppVersionStringJsonConverter() : this(false)
+    {
+    }
+
     /// <summary>
     /// Writes the JSON representation of the object.
     /// </summary>
@@ -19,7 +23,7 @@ public class AppVersionStringJsonConverter : JsonConverter
             return;
         }
 
-        if (value is not AppVersion appVersion)
+        if (serializeAsObject || value is not AppVersion appVersion)
             writer.WriteValue(value);
         else
             writer.WriteValue(appVersion.ToString());