fix(package): update update-notifier to version 2.3.0

Author: greenkeeper[bot]

package.json

@@ -18,7 +18,7 @@
     "doxdox-plugin-markdown": "~1.1.3",
     "globby": "6.1.0",
     "parse-cmd-args": "2.0.0",
-    "update-notifier": "2.2.0"
+    "update-notifier": "2.3.0"
   },
   "devDependencies": {
     "@neogeek/eslint-config-standards": "^2.0.0",