chore(deps): update dependency @vue/test-utils to v1.3.6

Author: renovate[bot]

packages/vue2-strategy/package.json

@@ -18,7 +18,7 @@
   },
   "devDependencies": {
     "@types/jest": "^26.0.0",
-    "@vue/test-utils": "1.0.0-beta.29",
+    "@vue/test-utils": "1.3.6",
     "css-loader": "^2.1.1",
     "del": "^3.0.0",
     "devextreme-vue-generator": "^3.0.1",