Add support for --javascript-delay

[icnocop]

Hi.

Thank you for crPDF.

wkhtmltopdf supports the --javascript-delay command line option.

See https://wkhtmltopdf.org/usage/wkhtmltopdf.txt

If a javascript delay isn't supported in puppeteer, I'm thinking crPDF should just ignore the command line option.

Currently, crPDF outputs error: unknown option '--javascript-delay' and doesn't produce the expected output.

Thank you.

[JorgenEvens]

Hi @icnocop ,

Thanks for your interest in this project, I'll try to look into this and your other issues later today.

[icnocop]

Hi @JorgenEvens.

I went ahead and implemented these feature requests in another project.

You may close the issues I created if you'd like.

Thank you for the inspiration! 🌟