fix(package): update commander to version 3.0.0 (#597)

Author: greenkeeper[bot]

package.json

@@ -37,7 +37,7 @@
     "bip32-path": "^0.4.2",
     "blakejs": "^1.1.0",
     "bs58check": "^2.1.1",
-    "commander": "^2.14.1",
+    "commander": "^3.0.0",
     "joi-browser": "^13.4.0",
     "libsodium-wrappers-sumo": "0.7.5",
     "ramda": "^0.26.1",