Prepare release 6.0.0-beta

Prepare release 5.4.2

Changelog: not update to database version 5.3.1-2026-03-26

Merge branch 'publish'

Merge branch 'publish'

# Conflicts:
#	CHANGELOG.md

Merge branch 'publish'

README: add TOML version catalog example, add supported platforms, tools

Using KTS and a TOML version catalog is the new default for Android
projects, so make it the primary example.

Changelog: adjust for 5.0.1 release

Prepare Java release 4.3.1

Prepare Java release 4.3.0