fix(package): update chalk to version 2.0.0

Author: greenkeeper[bot]

package.json

@@ -43,7 +43,7 @@
     "gruntplugin"
   ],
   "dependencies": {
-    "chalk": "^1.0.0",
+    "chalk": "^2.0.0",
     "documentation": "4.0.0-rc.1",
     "escape-string-regexp": "^1.0.5"
   },