fix ref context

Author: ruojianll

package.json

@@ -1,6 +1,6 @@
 {
   "name": "vue-facing-decorator",
-  "version": "2.1.5",
+  "version": "2.1.6",
   "description": "Vue typescript class and decorator based component.",
   "main": "dist/index.js",
   "keywords": [

src/option/ref.ts

@@ -14,12 +14,12 @@ export function build(cons: Cons, optionBuilder: OptionBuilder) {
     if (names) {
         optionBuilder.beforeCreateCallbacks??=[]
         optionBuilder.beforeCreateCallbacks.push(function(this:any){
-
+            const ctx = this
             names.forEach((value, name) => {
 
                 Object.defineProperty(this,name,{
                     get(this:any){
-                        return this.$refs[name]
+                        return ctx.$refs[name]
                     }
                 })