package: use bs58 1.2.1

Author: dcousens

package.json

@@ -73,12 +73,10 @@
   },
   "dependencies": {
     "bigi": "1.1.0",
-    "bs58": "1.1.0",
-    "bs58check": "1.0.0",
-    "crypto-browserify": "3.0.0",
+    "bs58": "1.2.1",
+    "bs58check": "1.0.1",
     "crypto-js": "3.1.2-3",
-    "crypto-browserify": "2.1.8",
-    "ecurve": "0.10.0",
-    "secure-random": "1.1.1"
+    "crypto-browserify": "3.0.0",
+    "ecurve": "0.10.0"
   }
 }