-h/--help option does not output the banner

[Xenonym]

Tell us about your environment

• MarkBind Version: 1.17.1

What did you do? Please include the actual source code causing the issue.
I ran markbind -h/--help / markbind <option> -h/--help.

What did you expect to happen?
Like other commands, -h/--help should output with the header:

  __  __                  _      ____    _               _
 |  \/  |   __ _   _ __  | | __ | __ )  (_)  _ __     __| |
 | |\/| |  / _` | | '__| | |/ / |  _ \  | | | '_ \   / _` |
 | |  | | | (_| | | |    |   <  | |_) | | | | | | | | (_| |
 |_|  |_|  \__,_| |_|    |_|\_\ |____/  |_| |_| |_|  \__,_|

 v1.17.1
 
  Usage: markbind <command>


  Options:

    -V, --version  output the version number
    -h, --help     output usage information


  Commands:

    init|i [root]                      init a markbind website project
    serve|s [options] [root]           build then serve a website from a directory
    deploy|d [options]                 deploy the site to the repo's Github pages.
    build|b [options] [root] [output]  build a website

What actually happened? Please include the actual, raw output.
The help information was printed without a header:

PS C:\Users\pzy5a\Desktop\testbind> markbind -h

  Usage: index  <command>


  Options:

    -V, --version  output the version number
    -h, --help     output usage information


  Commands:

    init|i [root]                      init a markbind website project
    serve|s [options] [root]           build then serve a website from a directory
    deploy|d [options]                 deploy the site to the repo's Github pages.
    build|b [options] [root] [output]  build a website

This was also the case for option help eg. markbind serve -h/--help.
Also, the usage information is improperly formatted; it should be markbind <command> instead of index <command> (note the extraneous space).

[madanalogy]

I have investigated the issue and have a suggested fix in #946

The current version of commander does not support custom help messages: tj/commander.js#893. However, commander v3.0 supports customisation of help messages and flags: tj/commander.js#242 (comment).

My suggested fix is to upgrade commander and make use of the helpOption() function as described in https://github.com/tj/commander.js/#automated---help.

I also fixed the usage information by setting program.name to markbind.

As I am new to node and npm however, I am unsure whether simply updating the version in package.json is sufficient to update the deployed version of commander.

Any and all comments are appreciated!