`global` Reference Error in Browser Environment

When using `randombytes@2.1.0` in a browser environment with Vite as the build tool, the following error occurs:

```bash
Uncaught ReferenceError: global is not defined
```

This error stems from the browser.js implementation attempting to access the `global` object which is not available in browser DOM environments:

```javascript
var Buffer = require('safe-buffer').Buffer
var crypto = global.crypto || global.msCrypto
```

As the source code mentioned below `crypto` is defined correctly

https://github.com/browserify/randombytes/blob/b4eb4126fccc503e375853ca7b3e96aaa34af9e6/browser.js#L15-L16

Start with browser.js at the linked implementation and reproduce the failure by using randombytes@2.1.0 in a browser environment built with Vite. Trace the browser-side crypto initialization and verify that the build no longer raises "global is not defined" while still accessing the browser crypto implementation.

索引モデルが issue の本文から書いたものです。