fix optional callback data in definition

runtime/js/runtime/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@wailsapp/runtime",
-  "version": "1.0.10",
+  "version": "1.0.11",
   "description": "Wails Javascript runtime library",
   "main": "main.js",
   "types": "runtime.d.ts",
@@ -25,4 +25,4 @@
   "devDependencies": {
     "dts-gen": "^0.5.8"
   }
-}
+}

runtime/js/runtime/runtime.d.ts

@@ -6,12 +6,12 @@ declare const wailsapp__runtime: {
         OpenURL(url: string): Promise<any>;
     };
     Events: {
-        Acknowledge(eventName: string): void; 
-        Emit(eventName: string): void;
-        Heartbeat(eventName: string, timeInMilliseconds: number, callback: () => void): void;
-        On(eventName: string, callback: () => void): void;
-        OnMultiple(eventName: string, callback: () => void, maxCallbacks: number): void;
-        Once(eventName: string, callback: () => void): void;
+        Acknowledge(eventName: string): void;
+        Emit(eventName: string, data?: any): void;
+        Heartbeat(eventName: string, timeInMilliseconds: number, callback: (data?: any) => void): void;
+        On(eventName: string, callback: (data?: any) => void): void;
+        OnMultiple(eventName: string, callback: (data?: any) => void, maxCallbacks: number): void;
+        Once(eventName: string, callback: (data?: any) => void): void;
     };
     Init(callback: () => void): void;
     Log: {