3.11.0

Development:

• Remove dependency on Selene Unicode and add preliminary support for LuaMetaTeX and ConTeXt standalone.
  (originally reported by @andreiborisov in #402 and #436, and by @Witiko in latex3#1518 and [email protected]; fixed in #551..#553 by @Witiko and @lostenderman, and in latex3#1670 and latex3#1671 by @hanshagen, @josephwright, @Skillmon, and @muzimuzhi)

Fixes:

• Prevent left-flanking and right-flanking delimiter runs followed by multi-byte whitespace or punctuation characters.
  (fixed in #552 and #553 by @Witiko and @lostenderman)

Documentation:

• Add a man page for markdown2tex. (suggested by @karlberry in #547; added by @Witiko in #554..#556)

Docker:

• Install the current package tinyyaml in historical TeX Live Docker images.
  (added by @Witiko in 18cb17f and bfb6dfb, many thanks to @zepinglee for keeping the CTAN package up-to-date)

Tests:

• Test that nested numbers are correctly parsed by package tinyyaml in YAML metadata.
  (added by @Witiko in #218 and istqb_product_base#172)