Acdh-tei-pyutils

What's Changed
* denormalize cli: listEvent support closes 6 by linxOD in https://github.com/acdh-oeaw/acdh-tei-pyutils/pull/7


**Full Changelog**: https://github.com/acdh-oeaw/acdh-tei-pyutils/compare/v0.27...v0.28

What's Changed
* Feature item and multiple id by linxOD in https://github.com/acdh-oeaw/acdh-tei-pyutils/pull/5

New Contributors
* linxOD made their first contribution in https://github.com/acdh-oeaw/acdh-tei-pyutils/pull/5

**Full Changelog**: https://github.com/acdh-oeaw/acdh-tei-pyutils/compare/v0.26.0...v0.27

also removes existing tei:back element