chore(package): update yeoman-assert to version 3.0.0

https://greenkeeper.io/

Author: greenkeeperio-bot

Diff for: package.json

@@ -83,7 +83,7 @@
     "run-sequence": "^1.2.1",
     "shelljs": "^0.7.5",
     "should": "^11.1.0",
-    "yeoman-assert": "^2.0.0",
+    "yeoman-assert": "^3.0.0",
     "yeoman-test": "~1.6.0"
   },
   "engines": {