feat(Utility): improve registerBootstrapBlazorModule method (#5936)

* chore: bump version 9.6.1-beta01

Co-Authored-By: Chason <yuchen7701@foxmail.com>
Co-Authored-By: RongguoLiu <26689767+rongguoliu@users.noreply.github.com>

* refactor: 优化 registerBootstrapBlazorModule 方法

---------

Co-authored-by: Chason <yuchen7701@foxmail.com>
Co-authored-by: RongguoLiu <26689767+rongguoliu@users.noreply.github.com>

Author: 3 people

src/BootstrapBlazor/BootstrapBlazor.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Razor">
 
   <PropertyGroup>
-    <Version>9.6.0</Version>
+    <Version>9.6.1-beta01</Version>
   </PropertyGroup>
 
   <ItemGroup>

src/BootstrapBlazor/wwwroot/modules/utility.js

@@ -822,17 +822,21 @@ export function registerBootstrapBlazorModule(name, identifier, callback) {
             }
             if (this._init === false) {
                 this._init = true;
-                cb(this);
+                if (isFunction(cb)) {
+                    cb(this);
+                }
             }
             return this;
         },
         dispose: function (id, cb) {
             if (id) {
                 this._items = this._items.filter(item => item !== id);
             }
-            if (this._items.length === 0 && cb) {
+            if (this._items.length === 0) {
                 this._init = false;
-                cb(this);
+                if (isFunction(cb)) {
+                    cb(this);
+                }
             }
         }
     };