What's Changed
* Fix `list(io)` raises an error by PythonFZ in https://github.com/zincware/ZnH5MD/pull/104
* Add `extend` progress bar by PythonFZ in https://github.com/zincware/ZnH5MD/pull/106
* ThreadPoolExecutor preparation by PythonFZ in https://github.com/zincware/ZnH5MD/pull/108
* remove unused code by PythonFZ in https://github.com/zincware/ZnH5MD/pull/111
* define tqdm progress bar limit by PythonFZ in https://github.com/zincware/ZnH5MD/pull/112
* Fix `io.extend([])` by PythonFZ in https://github.com/zincware/ZnH5MD/pull/114
**Full Changelog**: https://github.com/zincware/ZnH5MD/compare/v0.3.2...v0.3.3