feat: allow the browser build to be imported (#443)

Adding this small change will allow cloudflare worker users to easily use the yargs-parser as a library.

Co-authored-by: Benjamin E. Coe <[email protected]>

Author: TechplexEngineer

package.json

@@ -10,6 +10,9 @@
         "require": "./build/index.cjs"
       },
       "./build/index.cjs"
+    ],
+    "./browser": [
+      "./browser.js"
     ]
   },
   "type": "module",