community/py3-html-text: upgrade to 0.6.0
Moved the Git repository to https://github.com/zytedata/html-text. Added official support for Python 3.9-3.12. Removed support for Python 2.7 and 3.5-3.7. Switched the lxml dependency to lxml[html_clean] to support lxml >= 5.2.0. Switch from Travis CI to GitHub Actions. CI improvements.