Cleanup readme

Bump actions/setup-python from 4 to 5 (#6)

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 4 to 5.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v4...v5)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Update changelog

Update CI test workflow

Release 1.6.0

enhance lines re-indent on stripping

fix blocks stripping on non-changing lines

add additional inclusion tests

enhance lines stripping on `include`

Fix gh publish workflow