chore(deps): update devdependency @vue/test-utils to v2

Author: renovate[bot]

packages/typed-vuex/package.json

@@ -31,7 +31,7 @@
     "test:types": "tsd"
   },
   "devDependencies": {
-    "@vue/test-utils": "^1.3.6",
+    "@vue/test-utils": "^2.0.0",
     "tsd": "^0.20.0",
     "vue": "^2.7.16",
     "vuex": "^3.6.2"