[fix] 修复生成N2M桥接函数Stub时，失误将末尾项的sinature填成""的bug，正确应该是nullptr

Editor/MethodBridge/PlatformGeneratorBase.cs

@@ -36,7 +36,7 @@ Managed2NativeMethodInfo hybridclr::interpreter::g_managed2nativeStub[] =
                 lines.Add($"\t{{\"{method.CreateInvokeSigName()}\", __M2N_{method.CreateInvokeSigName()}}},");
             }
 
-            lines.Add($"\t{{\"\", nullptr}},");
+            lines.Add($"\t{{nullptr, nullptr}},");
             lines.Add("};");
         }
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "com.focus-creative-games.hybridclr_unity",
-  "version": "1.1.9",
+  "version": "1.1.10",
   "displayName": "HybridCLR",
   "description": "Unity package for HybridCLR. It includes editor and runtime scripts and assets for HybridCLR",
   "category": "Runtime",