Add link to beautiful-error

Author: ehmicky

README.md

@@ -669,6 +669,8 @@ individually:
   update an error's stack
 - [`handle-cli-error`](https://github.com/ehmicky/handle-cli-error): 💣 Error
   handler for CLI applications 💥
+- [`beautiful-error`](https://github.com/ehmicky/beautiful-error): Prettify
+  error messages and stacks
 - [`log-process-errors`](https://github.com/ehmicky/log-process-errors): Show
   some ❤ to Node.js process errors
 - [`error-http-response`](https://github.com/ehmicky/error-http-response):