Hepdata-lib

What's Changed
* build: Require Python 3.6+ for install by matthewfeickert in https://github.com/HEPData/hepdata_lib/pull/221
* chore: Apply pyupgrade --py36-plus by matthewfeickert in https://github.com/HEPData/hepdata_lib/pull/223


**Full Changelog**: https://github.com/HEPData/hepdata_lib/compare/v0.11.1...v0.12.0

**This is the last release to support Python 2!**

What's Changed
* fix: Use valid project/version requirement specifiers by matthewfeickert in https://github.com/HEPData/hepdata_lib/pull/218
* ci: Use micromamba to test Python and ROOT by matthewfeickert in https://github.com/HEPData/hepdata_lib/pull/220
* build: Add requires-python metadata by matthewfeickert in https://github.com/HEPData/hepdata_lib/pull/222


**Full Changelog**: https://github.com/HEPData/hepdata_lib/compare/v0.11.0...v0.11.1

What's Changed
* Add Singularity documentation by clelange in https://github.com/HEPData/hepdata_lib/pull/195
* ci: Update tests workflow by matthewfeickert in https://github.com/HEPData/hepdata_lib/pull/199
* Add dependabot config for GitHub actions by clelange in https://github.com/HEPData/hepdata_lib/pull/201
* Add readthedocs pull request preview action by clelange in https://github.com/HEPData/hepdata_lib/pull/202
* Replace m2r by m2r2 and fix version to 0.3.3 by clelange in https://github.com/HEPData/hepdata_lib/pull/207
* Update copyright to 2022 by clelange in https://github.com/HEPData/hepdata_lib/pull/208
* Dealing with symmetric and asymmetric uncertainties at the same time by frgigr in https://github.com/HEPData/hepdata_lib/pull/213

New Contributors
* matthewfeickert made their first contribution in https://github.com/HEPData/hepdata_lib/pull/199
* frgigr made their first contribution in https://github.com/HEPData/hepdata_lib/pull/213

**Full Changelog**: https://github.com/HEPData/hepdata_lib/compare/v0.10.1...v0.11.0

What's Changed
* Submission.create_files: Set remove_old default to False by AndreasAlbert in https://github.com/HEPData/hepdata_lib/pull/193


**Full Changelog**: https://github.com/HEPData/hepdata_lib/compare/v0.10.0...v0.10.1

What's Changed
* Update to GitHub container registry by clelange in https://github.com/HEPData/hepdata_lib/pull/185
* write_image: Only convert images if target is outdated. by AndreasAlbert in https://github.com/HEPData/hepdata_lib/pull/188
* Fix building docs by clelange in https://github.com/HEPData/hepdata_lib/pull/190
* Validation of output tarballs by AndreasAlbert in https://github.com/HEPData/hepdata_lib/pull/189


**Full Changelog**: https://github.com/HEPData/hepdata_lib/compare/v0.9.0...v0.10.0

What's Changed
* Handle nested TPads to get TObject by longjon929 in https://github.com/HEPData/hepdata_lib/pull/176
* Move pylint to test dependencies and split python2 and 3 version requ… by clelange in https://github.com/HEPData/hepdata_lib/pull/182
* Fix readthedocs building by clelange in https://github.com/HEPData/hepdata_lib/pull/184
* Add GitHub Action workflow to push docker image on release to ghcr.io by clelange in https://github.com/HEPData/hepdata_lib/pull/183

New Contributors
* longjon929 made their first contribution in https://github.com/HEPData/hepdata_lib/pull/176

**Full Changelog**: https://github.com/HEPData/hepdata_lib/compare/v0.8.1...v0.9.0