Added typescript declarations. Closes #91

Author: robinvdvleuten

index.d.ts

@@ -0,0 +1,14 @@
+import { Store, MutationPayload } from 'vuex';
+
+interface Options {
+    key?: string;
+    paths?: string[];
+    reducer?: (state: any, paths: string[]) => object;
+    subscriber?: (store: typeof Store) => (handler: () => void) => void;
+    storage?: Storage;
+    getState?: (key: string, storage: Storage) => any;
+    setState?: (key: string, state: typeof Store, storage: Storage) => void;
+    filter?: (mutation: MutationPayload) => boolean;
+}
+
+export default function createPersistedState(options?: Options): any;

package.json

@@ -18,8 +18,11 @@
   "module": "dist/vuex-persistedstate.es.js",
   "jsnext:main": "dist/vuex-persistedstate.es.js",
   "umd:main": "dist/vuex-persistedstate.umd.js",
+  "typings": "./vuex-persistedstate.d.ts",
   "files": [
-    "dist"
+    "dist",
+    "index.d.ts",
+    "index.js"
   ],
   "scripts": {
     "build": "rimraf dist && microbundle --external all --name createPersistedState index.js",