Usage without polyfills

the library cipher-base from browserify-sign is using node js internal module 'stream'
which is not available in the browser.

I have come up with a fix for now which is to patch require('stream') to be require('readable-stream'), but it's not very elegant.

To reproduce:
- start a vite project with rollup bundler for react
- import crypto-browserify and try to sign using createSign

Expected:
- It should work

Actual:
- Cannot read property call of undefined at require('stream').Transform