Bump xattr version to 0.10.0. (#7005)

# Pull Request Check List

Resolves: #6928 

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Bump `xattr` version to `0.10.0`.

This fixes #6891, which is not a problem with the user's environment as
suggested by the maintainer of xattr at xattr/xattr#108, but in fact the
problem of the package which was fixed by xattr/xattr#106.

Looking at the [changes in the version
bump](xattr/xattr@v0.9.9...v0.10.0), there
does not seem to be any significant changes other than shabang
xattr/xattr#106.

Co-authored-by: Moonsik Park <moonsik.park@estsoft.com>
Co-authored-by: Bartosz Sokorski <b.sokorski@gmail.com>

pyproject.toml

@@ -73,7 +73,7 @@ tomlkit = ">=0.11.1,<1.0.0,!=0.11.2,!=0.11.3"
 trove-classifiers = "^2022.5.19"
 # exclude 20.4.5 - 20.4.6 due to https://github.com/pypa/pip/issues/9953
 virtualenv = "^20.4.3,!=20.4.5,!=20.4.6"
-xattr = { version = "^0.9.7", markers = "sys_platform == 'darwin'" }
+xattr = { version = "^0.10.0", markers = "sys_platform == 'darwin'" }
 urllib3 = "^1.26.0"
 
 [tool.poetry.group.dev.dependencies]