chore(deps): update devdependency jest to v26

Author: renovate-bot

package.json

@@ -75,7 +75,7 @@
     "eslint-plugin-standard": "^4.0.0",
     "eslint-plugin-vue": "^5.2.2",
     "husky": "^1.3.1",
-    "jest": "^24.5.0",
+    "jest": "^26.6.3",
     "jest-serializer-vue": "^2.0.2",
     "jsdom": "^14.0.0",
     "standard-version": "^5.0.1",