upgrading 'request' version to avoid a vulnerability Karthik Balachan…

…dran committed

vuln https://nodesecurity.io/advisories/566
by way of
coinbase@2.0.6
request@2.74.0
hawk@3.1.3
hoek@2.16.3

package.json

@@ -14,7 +14,7 @@
     "http-errors": "1.3.1",
     "lodash": "3.1.0",
     "object-assign": "2.0.0",
-    "request": "2.74.0"
+    "request": "2.85.0"
   },
   "description": "The Coinbase API for Node.js",
   "devDependencies": {