Upgrade sequelize (major) (#1335)

Author: langpavel

package.json

@@ -47,7 +47,7 @@
     "redux": "^3.6.0",
     "redux-logger": "^3.0.1",
     "redux-thunk": "^2.2.0",
-    "sequelize": "^3.30.4",
+    "sequelize": "^4.2.0",
     "serialize-javascript": "^1.3.0",
     "source-map-support": "^0.4.15",
     "sqlite3": "^3.1.8",