bump BWU

package.json

@@ -2,7 +2,7 @@
   "name": "bitcore-wallet-service",
   "description": "A service for Mutisig HD Bitcoin Wallets",
   "author": "BitPay Inc",
-  "version": "0.0.38",
+  "version": "0.0.39",
   "keywords": [
     "bitcoin",
     "copay",
@@ -20,7 +20,7 @@
   "dependencies": {
     "async": "^0.9.0",
     "bitcore": "^0.12.9",
-    "bitcore-wallet-utils": "^0.0.19",
+    "bitcore-wallet-utils": "^0.0.20",
     "body-parser": "^1.11.0",
     "coveralls": "^2.11.2",
     "email-validator": "^1.0.1",