fixed save updating breaking

Android/Properties/AndroidManifest.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="TouchyTickets.Android"
-        android:versionCode="020" android:versionName="0.2.0">
+        android:versionCode="021" android:versionName="0.2.1">
     <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="28"/>
     <application android:label="Touchy Tickets"/>
 </manifest>

TouchyTickets/SaveHandler.cs

@@ -9,7 +9,6 @@ namespace TouchyTickets {
     public static class SaveHandler {
 
         public static readonly JsonSerializer Serializer = JsonSerializer.Create(new JsonSerializerSettings {
-            DefaultValueHandling = DefaultValueHandling.IgnoreAndPopulate,
             TypeNameHandling = TypeNameHandling.Auto,
             Formatting = Formatting.Indented
         });