Add keepAlive option for socket

I am using this module in conjunction with sequelize in an environment where keep-alive needs to be set on open sockets. In order to set keep-alive on the sockets I have to monkey-patch sequelize like this:

var manager = sequelize.connectionManager;
var getConnection = manager.getConnection;
manager.getConnection = function () {
    return getConnection.apply(manager, arguments).then((conn) => {
        conn.stream.setKeepAlive(true, 120000);
        return conn;
    });
};

Would it be possible to add a keepAlive option to the connection constructor? I realize API compatibility with node-mysql is a priority here, so let me know if I should file this issue over there instead.

Start at the connection constructor and the socket exposed as conn.stream, using the Sequelize monkey-patch as the behavioral example. Trace how connection options reach socket creation, then verify that a keepAlive option enables the requested keep-alive behavior without requiring monkey-patching.