Request: implement a close function (deprecate kthxbye)

[cuzzlor]

Why this request

• Winston transports have an optional close() function defined.
• Having to use kthxbye (not typed / standard) makes use with typescript painful and requires special treatment for cloudwatch transports vs other transports.

Action requested
Would it be too much trouble to add a close() function that runs kthxbye((error) => console.log(error))?

Type definitions

// Type definitions for winston-transport 3.0
// Project: https://github.com/winstonjs/winston-transport
// Definitions by: DABH <https://github.com/DABH>
// Definitions: https://github.com/winstonjs/winston-transport

/// <reference types="node" />

import * as stream from 'stream';
import * as logform from 'logform';

declare class TransportStream extends stream.Writable {
  public format?: logform.Format;
  public level?: string;
  public silent?: boolean;
  public handleExceptions?: boolean;
  public handleRejections?: boolean;

  constructor(opts?: TransportStream.TransportStreamOptions);

  public log?(info: any, next: () => void): any;
  public logv?(info: any, next: () => void): any;
  public close?(): void;
}