fix(Toast): failed to modify message

src/toast/index.js

@@ -59,11 +59,17 @@ function createInstance() {
       data() {
         return {
           timer: null,
+          message: null,
           toastProps: {
             show: false,
           },
         };
       },
+      watch: {
+        message(val) {
+          this.toastProps.message = val;
+        },
+      },
       methods: {
         clear() {
           this.toggle(false);