What's Changed
* DOC: add new dev section to release_notes.md by kmuehlbauer in https://github.com/wradlib/wradlib/pull/645
* REGR: make pyproj import lazy by kmuehlbauer in https://github.com/wradlib/wradlib/pull/646
* Bump actions/checkout from 3 to 4 by dependabot in https://github.com/wradlib/wradlib/pull/642
* MNT: add codecov.yml to configure coverage status checks by kmuehlbauer in https://github.com/wradlib/wradlib/pull/647
* FIX: enable radolan backend to work without GDAL by kmuehlbauer in https://github.com/wradlib/wradlib/pull/649
* Fix cross_section_ppi in util.py for wradlib 2.0 by JulianGiles in https://github.com/wradlib/wradlib/pull/650
* Fix colorbar handling for curvelinear grid plots by kmuehlbauer in https://github.com/wradlib/wradlib/pull/652
* FIX: properly implement bearer token authentication and function calling convention for plot_scan_strategy by kmuehlbauer in https://github.com/wradlib/wradlib/pull/653
* FIX: align earth radius in plot_scan_strategy for CG plots by kmuehlbauer in https://github.com/wradlib/wradlib/pull/655
* ENH: add PZ-product (DWD station product) to RADOLAN reader by kmuehlbauer in https://github.com/wradlib/wradlib/pull/656
* FIX: pin sphinx-book-theme to fix rtd builds by kmuehlbauer in https://github.com/wradlib/wradlib/pull/658
* util.py: Update crs default value in cross_section_ppi by JulianGiles in https://github.com/wradlib/wradlib/pull/657
* Bump actions/setup-python from 4 to 5 by dependabot in https://github.com/wradlib/wradlib/pull/660
* MNT: update pre-commit hooks, fix lint by kmuehlbauer in https://github.com/wradlib/wradlib/pull/665
* Bump codecov/codecov-action from 3 to 4 by dependabot in https://github.com/wradlib/wradlib/pull/664
* MNT: update CI, numpy2 by kmuehlbauer in https://github.com/wradlib/wradlib/pull/670
* MNT: add codecov token to CI by kmuehlbauer in https://github.com/wradlib/wradlib/pull/672
* MNT: code changes according DeprecationWarnings etc by kmuehlbauer in https://github.com/wradlib/wradlib/pull/673
* REL: wradlib release 2.1.0 by kmuehlbauer in https://github.com/wradlib/wradlib/pull/674
New Contributors
* dependabot made their first contribution in https://github.com/wradlib/wradlib/pull/642
**Full Changelog**: https://github.com/wradlib/wradlib/compare/2.0.0...2.1.0