Better typings

[dev101]

#289 was not enough as I missed another typo:

FastifyPluginCallback should be imported from fastify, not from fastify-plugin.

Actually, I'd recommend to follow typings best practices:

• namespace plugin and its options
• export const and default

Here is my take for index.d.ts:

import { FastifyPluginCallback } from 'fastify'

type FastifyTrapsPlugin = FastifyPluginCallback<fastifyTraps.FastifyTrapsOptions>

declare namespace fastifyTraps {

  export interface FastifyTrapsOptions {
    timeout?: number
    onSignal?: (signal: 'SIGTERM' | 'SIGINT') => void
    onClose?: () => void
    onTimeout?: (timeout: number) => void
    onError?: (error: Error|any) => void
    strict?: boolean
  }

  export const fastifyTraps: FastifyTrapsPlugin
  export { fastifyTraps as default }
}

declare function fastifyTraps(
  ...params: Parameters<FastifyTrapsPlugin>
): ReturnType<FastifyTrapsPlugin>

export = fastifyTraps

[dnlup]

Thanks @dev101 for reporting this, would like to open a PR?