add nip06.

nip06.js

@@ -1,4 +1,5 @@
 import createHmac from 'create-hmac'
+import randomBytes from 'randombytes'
 import * as bip39 from 'bip39'
 
 export function privateKeyFromSeed(seed) {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "nostr-tools",
-  "version": "0.7.0",
+  "version": "0.7.1",
   "description": "Tools for making a Nostr client.",
   "repository": {
     "type": "git",