feat: Update weasyprint to 55.0

[kesara]

• Update weasyprint to 55.0.
• Replace PyPDF2 with pdfplumber.

This changes PDF generation from cairo to pydyf.

Fixes #696

[dkg]

fwiw, this will make things harder for me to maintain and adequately test in debian, since debian doesn't have pdfplumber. I've just gotten pypdf2 fixed upstream to be able to correctly handle the types of output produced by more recent versions of weasyprint.

For simplicity and ease of maintenance and testing, my preference would be:

• avoid the switch from pypdf2 to pdfplumber for testing, just require pypdf2 version 2.6.0 and above (first version with the fix to avoid the CMap crashing)
• drop all explicit mentions of cairo
• require the first version of weasyprint that dropped cairo (53.0b1) or any newer one

[kesara]

@dkg, Thanks for the update.
pypdf2 version 2.6.0 seems to fix the issues that I had with PDF test, so I can drop that commit.
Since WeasyPrint 53.0b1 is a pre-release, I'd like to set v53.0 as the minimum Weasyprint requirement. Hope that's okay.

[rjsparks]

Shouldn't this be >=55 now?

[dkg]

Why >= 55? weasyprint is actually at 56 now upstream, but there's no good reason to increase the version if you don't actually need the newer version.

Put another way: please do not gratuitously increase the minimum version needed. if 53.0 works as well, there's no reason to have the elevated version requirements.

If there is a specific reason that 55 is necessary, then of course make it required, but otherwise, you do the ecosystem a favor by indicating the flexibility explicitly.

[kesara]

I don't see any specific reason for using 55 or 56 at this point.
So I'm happy to keep weasyprint>=53.0 for wider compatibility.
But services like author tools will start using the latest available version.

[dkg]

yep, that sounds entirely reasonable. the specified version ranges are constraints, but of course any specific instance will choose whatever version of the package it wants as long as it's within the constraints.

[jennifer-richards]

another place for >=55.0?

[dkg]

same as above, i recommend keeping the minimum at 53 (where there is no cairo) unless you have a clear reason to believe that it requires 55.

[dkg]

@kesara wrote:

Since WeasyPrint 53.0b1 is a pre-release, I'd like to set v53.0 as the minimum Weasyprint requirement. Hope that's okay.

Yes, that makes sense to me. I was being hyper-precise by indicating the first visible release that dropped cairo, but you're right that it makes sense to only target "official" release versions.