deps - use pure js scryptsy for node v12 support

Author: kumavis

package.json

@@ -37,7 +37,7 @@
   },
   "homepage": "https://github.com/ethereumjs/ethereumjs-wallet",
   "dependencies": {
-    "@web3-js/scrypt-shim": "^0.1.0",
+    "scryptsy": "^1.2.1",
     "aes-js": "^3.1.1",
     "bs58check": "^2.1.2",
     "ethereumjs-util": "^6.0.0",

src/index.js

@@ -2,7 +2,7 @@ var Buffer = require('safe-buffer').Buffer
 var ethUtil = require('ethereumjs-util')
 var crypto = require('crypto')
 var randomBytes = require('randombytes')
-var scryptsy = require('@web3-js/scrypt-shim')
+var scryptsy = require('scryptsy')
 var uuidv4 = require('uuid/v4')
 var bs58check = require('bs58check')
 

src/thirdparty.js

@@ -1,7 +1,7 @@
 var Wallet = require('./index.js')
 var ethUtil = require('ethereumjs-util')
 var crypto = require('crypto')
-var scryptsy = require('@web3-js/scrypt-shim')
+var scryptsy = require('scryptsy')
 var utf8 = require('utf8')
 var aesjs = require('aes-js')
 var Buffer = require('safe-buffer').Buffer