PDFtk as optional/peer dependency?

[moravcik]

Hello, thank you for your lib, we are actually using it for signing PDFs.

As I can see there is a large dependency tree introduced by pdftk, but nothing of it is actually used for just signing PDF. This could be fixed by marking pdftk and commonpdf_pdftk as optional/peer dependency or just create dedicated module for signing PDFs.

The same should apply for commonpdf_podofo as well, if someone is not interested in signing PDFs.

What do you think?

[corymickelson]

@moravcik Yes this has been something I've had in mind for a while, exposing some option and build script for "compiling" CommonPdf for specific use cases. I honestly have no idea when I will be able to get to this, it could take a couple months.