chore(package): update assume to version 2.0.1 (#14)

Closes #11

Author: lpinca

package.json

@@ -25,7 +25,7 @@
     "url-parse": "~1.4.0"
   },
   "devDependencies": {
-    "assume": "~1.5.0",
+    "assume": "~2.0.1",
     "istanbul": "0.4.x",
     "mocha": "~3.5.0",
     "pre-commit": "~1.2.0"