chore(deps): update dependency jest to v26 (#38)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

package.json

@@ -32,7 +32,7 @@
     "babel-eslint": "^10.0.0",
     "eslint": "^4.19.1",
     "eslint-plugin-vue": "^4.7.1",
-    "jest": "^25.0.0",
+    "jest": "^26.0.0",
     "jest-serializer-vue": "^2.0.2",
     "lerna-changelog": "^1.0.0",
     "shipjs": "^0.18.0",