chore(deps): bump yargs from 8.0.2 to 15.1.0 (#639)

Author: dependabot-preview[bot]

package.json

@@ -30,7 +30,7 @@
   "dependencies": {
     "glob": "^7.1.2",
     "rimraf": "^2.6.2",
-    "yargs": "^8.0.2"
+    "yargs": "^15.1.0"
   },
   "devDependencies": {
     "@commitlint/cli": "^8.3.4",

packages/package-generator/package.json

@@ -31,7 +31,7 @@
     "rimraf": "^2.6.2",
     "semver": "^6.0.0",
     "tslib": "^1.8.0",
-    "yargs": "^8.0.2"
+    "yargs": "^15.1.0"
   },
   "devDependencies": {
     "@types/jest": "^24.0.12",