chore(package): update sequelize to version 3.16.0

http://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -44,7 +44,7 @@
     "mocha": "^2.2.5",
     "pg": "^4.4.2",
     "pg-hstore": "^2.3.2",
-    "sequelize": "^3.14.0",
+    "sequelize": "^3.16.0",
     "sinon": "^1.15.4",
     "sinon-chai": "^2.8.0",
     "sqlite3": "^3.0.9"