handle "$options === null" case

Author: moxun1639

dist/vue-data-dict.js

@@ -1,6 +1,6 @@
 {
   "name": "vue-data-dict",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "data dict for Vue.js",
   "main": "src/index.js",
   "unpkg": "dist/vue-data-dict.js",

package.json

@@ -1,13 +1,13 @@
-import Dependency from './Dependency'
+import Dependency from './Dependency'
 import Dict from './Dict'
 import { mergeOptions } from './DictOptions'
 
 export default function(Vue, options) {
-  Dependency.Vue = Vue
+  Dependency.Vue = Vue
   mergeOptions(options)
   Vue.mixin({
     data() {
-      if (this.$options.dicts === undefined || this.$options.dicts === null) {
+      if (!this.$options || this.$options.dicts === undefined || this.$options.dicts === null) {
         return {}
       }
       const dict = new Dict()