Change IsOfflineChanged type

Author: TDroogers

Src/Drogecode.Blazor.ExpireStorage/Drogecode.Blazor.ExpireStorage.csproj

@@ -5,7 +5,7 @@
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <RootNamespace>Drogecode.Blazor.ExpireStorage</RootNamespace>
-    <Version>0.2.0</Version>
+    <Version>0.2.1</Version>
     <Title>Drogecode.Blazor.ExpireStorage</Title>
     <Authors>Taco Droogers</Authors>
     <PackageProjectUrl>https://github.com/Drogecode/Drogecode.Blazor.ExpireStorage</PackageProjectUrl>

Src/Drogecode.Blazor.ExpireStorage/Services/ExpireStorageService.cs

@@ -15,7 +15,7 @@ public class ExpireStorageService : IExpireStorageService
     /// </summary>
     public static string? Postfix { get; set; }
 
-    public static EventCallback<bool> IsOfflineChanged { get; set; }
+    public static event Func<bool, Task>? IsOfflineChanged;
 
     /// <summary>
     /// True if the last request failed.
@@ -27,7 +27,7 @@ private set
         {
             if (field == value) return;
             field = value;
-            IsOfflineChanged.InvokeAsync(field);
+            IsOfflineChanged?.Invoke(field);
         }
     }