Added "npm audit fix" to the "upgrade" script

Author: JamesMessinger

package.json

@@ -52,7 +52,7 @@
   "scripts": {
     "lint": "eslint .",
     "test": "mocha && npm run lint",
-    "upgrade": "npm-check -u",
+    "upgrade": "npm-check -u && npm audit fix",
     "bump": "bump --tag --push --all",
     "release": "npm run upgrade && npm test && npm run bump"
   },