chore(package): update ampersand-rest-collection to version 6.0.0

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -25,7 +25,7 @@
   "dependencies": {
     "ampersand-collection": "^1.6.1",
     "ampersand-model": "^6.0.2",
-    "ampersand-rest-collection": "^5.0.0",
+    "ampersand-rest-collection": "^6.0.0",
     "async": "^1.5.2",
     "lodash": "^4.8.2",
     "mongodb-ns": "^1.0.3",