set the Max to unlimited

Here is the issue:
(node) warning: possible EventEmitter memory leak detected. 11
listeners added. Use emitter.setMaxListeners() to increase limit.
Trace
    at EventEmitter.addListener (events.js:168:15)
    at module.exports.self.(anonymous function) [as addColumn]
(/Users/thomas/Desktop/RB/ensure_fk_indexes/lib/sequelize/lib/migration.
js:116:31)