chore: upgrade util from 0.12.0 to 0.12.1

Snyk has created this PR to upgrade util from 0.12.0 to 0.12.1.

See this package in NPM:
https://www.npmjs.com/package/util

See this project in Snyk:
https://app.snyk.io/org/armand-janssen/project/7e551d24-20a1-40bf-b509-4f1b1f610e4e?utm_source=github&utm_medium=upgrade-pr

Author: snyk-bot

package-lock.json

@@ -27,7 +27,7 @@
     "commander": "^2.19.0",
     "nyc": "^14.1.1",
     "sinon": "^7.3.2",
-    "util": "^0.12.0",
+    "util": "^0.12.1",
     "yaml": "^1.3.2"
   },
   "bin": {