package: use crypto-browserify 3.0.0

src/eckey.js

@@ -1,8 +1,8 @@
 var assert = require('assert')
 var base58check = require('bs58check')
+var crypto = require('crypto')
 var ecdsa = require('./ecdsa')
 var networks = require('./networks')
-var secureRandom = require('secure-random')
 
 var BigInteger = require('bigi')
 var ECPubKey = require('./ecpubkey')
@@ -43,7 +43,7 @@ ECKey.fromWIF = function(string) {
 }
 
 ECKey.makeRandom = function(compressed, rng) {
-  rng = rng || secureRandom.randomBuffer
+  rng = rng || crypto.randomBytes
 
   var buffer = rng(32)
   assert(Buffer.isBuffer(buffer), 'Expected Buffer, got ' + buffer)