feat: raise ApiLevel to 4

Prevents crashes for people that are on testing by accident

Author: goaaats

Dalamud/Plugin/Internal/PluginManager.cs

@@ -29,7 +29,7 @@ internal partial class PluginManager : IDisposable
         /// <summary>
         /// The current Dalamud API level, used to handle breaking changes. Only plugins with this level will be loaded.
         /// </summary>
-        public const int DalamudApiLevel = 3;
+        public const int DalamudApiLevel = 4;
 
         private static readonly ModuleLog Log = new("PLUGINM");