fix: Update source URL in dev rockspec for GitHub access

chore: Release v2.3.2

docs: Tweak formatting, links, and copy-editing in README

ci: Make build test local only, no network/deps

ci: Make build test local only, no network/deps

Merge pull request #37 from sile-typesetter/fix-stdlib-leftovers

deps: Explicitly call out minimum supported Penlight version

ci: Actualaly drop tests as stated in 443387a

fix: Explicitly cast to string before using string concatenation

Merge pull request #36 from sile-typesetter/ci

ci: Add latest Penlight to testing matrix, drop unnecessary versions

ci: Cleanup and normalize workflow systax

ci: Reuse deploy workflow from lunarmodules

refactor: Use more ideomatic Lua to avoid lint warnings

ci: Switch to new upstream GH Action variant of Luacheck