Update aes-js to 3.1.0

package.json

@@ -26,7 +26,7 @@
   },
   "homepage": "https://github.com/ethereumjs/ethereumjs-wallet",
   "dependencies": {
-    "aes-js": "^0.2.3",
+    "aes-js": "^3.1.0",
     "bs58check": "^2.1.1",
     "ethereumjs-util": "^5.1.4",
     "hdkey": "^0.7.0",

thirdparty.js

@@ -203,9 +203,10 @@ Thirdparty.fromKryptoKit = function (entropy, password) {
     /* eslint-disable new-cap */
     var decipher = new aesjs.ModeOfOperation.ecb(aesKey)
     /* eslint-enable new-cap */
+    /* decrypt returns an Uint8Array, perhaps there is a better way to concatenate */
     privKey = Buffer.concat([
-      decipher.decrypt(encryptedSeed.slice(0, 16)),
-      decipher.decrypt(encryptedSeed.slice(16, 32))
+      Buffer.from(decipher.decrypt(encryptedSeed.slice(0, 16))),
+      Buffer.from(decipher.decrypt(encryptedSeed.slice(16, 32)))
     ])
 
     if (checksum.length > 0) {