feat(typescript): add typings (#8)

package.json

@@ -4,8 +4,10 @@
   "description": "Prefetch the route components of router-link in viewport.",
   "main": "dist/index.js",
   "module": "dist/index.esm.js",
+  "types": "types/index.d.ts",
   "files": [
-    "dist"
+    "dist",
+    "types"
   ],
   "scripts": {
     "test": "npm run lint",

types/index.d.ts

@@ -0,0 +1,12 @@
+declare module 'vue-router-prefetch' {
+  import { PluginFunction } from 'vue'
+
+  export interface RouterPrefetchOptions {
+    componentName?: string;
+    prefetch?: boolean;
+  }
+
+  const install: PluginFunction<RouterPrefetchOptions>
+
+  export default install
+}