fix: upgrade util from 0.10.4 to 0.12.4 (#918)

Snyk has created this PR to upgrade util from 0.10.4 to 0.12.4.

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

See this project in Snyk:
https://app.snyk.io/org/dceejay/project/34c4615a-e656-449f-b5c4-62c59a9902ce?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

hardware/wemo/package.json

@@ -31,7 +31,7 @@
     "node-ssdp": "~3.2.5",
     "request": "~2.88.2",
     "xml2js": "~0.4.13",
-    "util": "~0.10.3",
+    "util": "~0.12.4",
     "url": "~0.11.0",
     "ip": "~1.0.1",
     "body-parser": "~1.20.0",