upgrade dependencies

Author: tianyong90

packages/vue-markdown-loader/package.json

@@ -57,7 +57,7 @@
     "eslint-friendly-formatter": "^4.0.1",
     "eslint-loader": "^3.0.0",
     "eslint-plugin-import": "^2.9.0",
-    "eslint-plugin-jest": "^22.5.0",
+    "eslint-plugin-jest": "^23.0.2",
     "eslint-plugin-node": "^10.0.0",
     "eslint-plugin-prettier": "^3.0.1",
     "eslint-plugin-promise": "^4.0.0",