build: update dependency yargs to v18

See associated pull request for more information.

Author: angular-robot

packages/angular/cli/package.json

@@ -37,7 +37,7 @@
     "pacote": "21.0.0",
     "resolve": "1.22.10",
     "semver": "7.7.2",
-    "yargs": "17.7.2"
+    "yargs": "18.0.0"
   },
   "ng-update": {
     "migrations": "@schematics/angular/migrations/migration-collection.json",