CB-12369: Add plugin typings from DefinitelyTyped

This closes #123

package.json

@@ -2,6 +2,7 @@
   "name": "cordova-plugin-splashscreen",
   "version": "4.0.2-dev",
   "description": "Cordova Splashscreen Plugin",
+  "types": "./types/index.d.ts",
   "cordova": {
     "id": "cordova-plugin-splashscreen",
     "platforms": [

types/index.d.ts

@@ -0,0 +1,17 @@
+// Type definitions for Apache Cordova Splashscreen plugin
+// Project: https://github.com/apache/cordova-plugin-splashscreen
+// Definitions by: Microsoft Open Technologies Inc <http://msopentech.com>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// 
+// Copyright (c) Microsoft Open Technologies Inc
+// Licensed under the MIT license.
+
+interface Navigator {
+    /** This plugin displays and hides a splash screen during application launch. */
+    splashscreen: {
+        /** Dismiss the splash screen. */
+        hide(): void;
+        /** Displays the splash screen. */
+        show(): void;
+    }
+}