deps: Update yargs dependency

Latest yargs version includes updates to dependency y18n which contains security vulnerability fixes

Author: lalli-flores

package.json

@@ -4,9 +4,7 @@
   "version": "13.1.1",
   "author": "Tom MacWright",
   "homepage": "https://documentation.js.org",
-  "bin": {
-    "documentation": "./bin/documentation.js"
-  },
+  "bin": "./bin/documentation.js",
   "dependencies": {
     "@babel/core": "7.12.3",
     "@babel/generator": "7.12.1",
@@ -73,7 +71,7 @@
     "vinyl": "^2.1.0",
     "vinyl-fs": "^3.0.2",
     "vue-template-compiler": "^2.5.16",
-    "yargs": "^15.3.1"
+    "yargs": "^16.2.0"
   },
   "devDependencies": {
     "babel-core": "^7.0.0-bridge.0",