chore(package): update david to version 11.0.0 (#887)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -12,7 +12,7 @@
     "update-dependencies": "david u && lerna exec david u"
   },
   "devDependencies": {
-    "david": "^10.0.0",
+    "david": "^11.0.0",
     "lerna": "2.0.0-beta.38",
     "lerna-changelog": "^0.4.0"
   },