Replace backslashes in windows upload (#1067)

* Update generate_unique_identifier lambda to use a posix path.

* Update Changelog.md

* add missing requests dependency for windows

* Generate poetry lock file.

* Revert changes of pyproject toml.

---------

Co-authored-by: Michael Büßemeyer <michael.buessemeyer@student.hpi.de>

webknossos/Changelog.md

@@ -19,6 +19,7 @@ For upgrade instructions, please check the respective _Breaking Changes_ section
 ### Changed
 
 ### Fixed
+- Performing `webknossos upload` on a windows machine leaded to loss of directory structure due to backslashes in the relative paths. This was fixed by [1067](https://github.com/scalableminds/webknossos-libs/pull/1067)
 
 
 ## [0.14.21](https://github.com/scalableminds/webknossos-libs/releases/tag/v0.14.21) - 2024-05-07

webknossos/webknossos/client/_upload_dataset.py

@@ -152,7 +152,7 @@ def upload_dataset(
  },
  chunk_size=100 * 1024 * 1024, # 100 MiB
  generate_unique_identifier=lambda _,
- relative_path: f"{upload_id}/{relative_path}",
+ relative_path: f"{upload_id}/{relative_path.as_posix()}",
  test_chunks=False,
  permanent_errors=[400, 403, 404, 409, 415, 500, 501],
  client=httpx.Client(timeout=None),