Typings don't support publishing objects

[jorispz]

When automatic JSON conversion is enabled, one would want to use the publish function like

const mymessage = { a: 1, b: "2"};
nats.publish("mysubject", mymessage);

However, the current Typescript signatures of the publish function do not support this:

publish(callback: Function):void;
publish(subject: string, callback: Function):void;
publish(subject: string, msg: string | Buffer, callback: Function):void;
publish(subject: string, msg?: string | Buffer, reply?: string, callback?: Function):void;

Instead, they should be

publish(callback: Function):void;
publish(subject: string, callback: Function):void;
publish(subject: string, msg: string | Buffer | object, callback: Function):void;
publish(subject: string, msg?: string | Buffer | object, reply?: string, callback?: Function):void;