2.19.0

Development:

• Add support for fenced divs and bracketed spans. (#126, #207)

Fixes:

• Fix incorrect category codes in plain TeX renderer prototype definitions. (f156f05)
• Allow backticks in tilde code block infostrings. (#214, #219, #221)

Refactoring:

• Sort Lua options, token renderers, and built-in syntax extensions. (#208)

Documentation:

• Add article High-Level Languages for TeX (in Czech) from CSTUG Bulletin 1–4/2022 to README.md. (authored by @Witiko, a2bbdea)

Continuous Integration:

• Make latexmk treat warnings as errors. (#228)