Add back meteor-node-stubs.

package.json

@@ -27,6 +27,7 @@
     "bcrypt": "^1.0.2",
     "bson": "^1.0.4",
     "es6-promise": "^4.1.0",
+    "meteor-node-stubs": "^0.2.6",
     "winston": "^2.3.1",
     "winston-zulip": "0.0.6",
     "xss": "^0.3.3"