use randomBytes from @noble/hashes.

nip04.js

@@ -1,6 +1,6 @@
 import aes from 'browserify-cipher'
 import {Buffer} from 'buffer'
-import randomBytes from 'randombytes'
+import {randomBytes} from '@noble/hashes/utils'
 import * as secp256k1 from '@noble/secp256k1'
 
 export function encrypt(privkey, pubkey, text) {

package.json

@@ -7,6 +7,7 @@
     "url": "https://github.com/fiatjaf/nostr-tools.git"
   },
   "dependencies": {
+    "@noble/hashes": "^0.5.7",
     "@noble/secp256k1": "^1.3.0",
     "browserify-cipher": ">=1",
     "buffer": ">=5",
@@ -14,7 +15,6 @@
     "dns-packet": "^5.2.4",
     "micro-bip32": "^0.1.0",
     "micro-bip39": "^0.1.3",
-    "randombytes": ">=2",
     "websocket-polyfill": "^0.0.3"
   },
   "keywords": [