Update dependency yargs to v14

Author: renovate-bot

package-lock.json

@@ -50,7 +50,7 @@
     "tmp": "0.1.0",
     "update-notifier": "^3.0.0",
     "which": "^1.3.1",
-    "yargs": "^13.0.0"
+    "yargs": "^14.0.0"
   },
   "devDependencies": {
     "chai": "^4.1.0",