add typescript definition file

Author: koddsson

index.d.ts

@@ -0,0 +1,16 @@
+export default class AutocompleteElement extends HTMLElement {
+  src: string;
+  value: string;
+  open: boolean;
+}
+
+declare type AutocompleteEventType = 'auto-complete-change'
+
+declare type AutocompleteEvent$Init = CustomEvent & {
+  relatedTarget: HTMLInputElement;
+}
+
+export class AutocompleteEvent extends CustomEvent<any> {
+  constructor(type: AutocompleteEventType, init: AutocompleteEvent$Init)
+  relatedTarget: HTMLInputElement;
+}

package.json

@@ -5,6 +5,7 @@
   "repository": "github/auto-complete-element",
   "main": "dist/index.umd.js",
   "module": "dist/index.esm.js",
+  "types": "index.d.ts",
   "scripts": {
     "clean": "rm -rf dist",
     "lint": "github-lint",
@@ -19,7 +20,8 @@
   ],
   "license": "MIT",
   "files": [
-    "dist"
+    "dist",
+    "index.d.ts"
   ],
   "dependencies": {
     "@github/combobox-nav": "^0.3.2"