Publ v0.8.19 released

Wow, it’s been a while since I’ve posted a release announcement, huh.

A lot has changed since the last announcement. Here’s a short-ish version of what’s changed:

• Update the minimum Python version to 3.10
• Remove the old/broken publ.__version__ mechanism
• Improve how entry plaintext output works
• Fix how <br> works in HTML sanitization
• Remove a bunch of deprecated stuff
• Stop trying to infer a timezone, which was causing more problems than it helped with (see note)
• Change the browser-side caching behavior to be more in line with modern standards
• Simplify crawler bot detection and detect new bots more generally
• Fix missing headers on certain error response pages (particularly Retry-After for 429 and 503), and generally clean up error handling
• Remove a useless old dependency on awesome-slugify
• Massively improve the publ normalize tool to make it actually useful (see note)
• Provide correct Content-Type headers for alternate error pages (e.g. via Accept)
• Improve the way that the Content-Type header is formed, and only force a utf-8 charset on text/* and if a charset isn’t already specified there