chore(package): update apiai to version 4.0.2 (#393)

https://greenkeeper.io/

package.json

@@ -127,7 +127,7 @@
     "@types/node": "7.0.12",
     "@types/sinon": "2.1.2",
     "@types/ws": "0.0.39",
-    "apiai": "4.0.1",
+    "apiai": "4.0.2",
     "ava": "0.18.2",
     "babel-eslint": "7.2.1",
     "check-node-version": "2.0.1",