Add declaration file for Typescript support

[mgrisole]

No description provided.

[bencevans]

Thanks for opening the PR. Are you aware of something we could add to the CI to ensure these declarations do not slip behind when future work is done?

[tupizz]

updating:

declare module 'screenshot-desktop' {
  declare interface Display {
    width: number;
    height: number;
    name: string;
    id: string;
    offsetX: number;
    offsetY: number;
    primary: boolean;
    crop: string;
  }

  declare interface Options {
    /**
    Optional. On which screen you want to take the picture.
    @default ""
  */
    screen?: string;

    /**
    Optional. Absolute or relative path to save output.
    @default ""
  */
    filename?: string;

    /**
    @default ""
  */
    format?: 'png' | 'jpg';

    /**
  linuxLibrary. Which library to use. Note that scrot does not support format or screen selection.
  Linux only
  */
    linuxLibrary?: 'scrot' | 'imagemagick';
  }

  declare namespace screenshot {
    /**
    @returns An array of Display.
    */
    function listDisplays(): Promise<Display[]>;

    /**
    @returns An array of Buffers, one for each screen.
    */
    function all(): Promise<Buffer[]>;
  }

  /**
    Screenshot-desktop capture function
    @returns The output file location.
  */
  declare function screenshot(options?: Options): Promise<string>;

  export default screenshot;
}