Allow Python 3.12 (#135)

Fedora 40 uses Python 3.12.

kobodl uses module `distutils` which was removed from Python 3.12. So
run `poetry add setuptools`. This bumps the minimum supported Python
version to 3.9.

Poetry demanded that the lock file be updated after the change, so run
`poetry lock --no-update`.

Author: linyaa-kiwi

poetry.lock

@@ -28,7 +28,7 @@ keywords = ["Kobo", "eBook", "Audiobook", "Downloader", "DRM"]
 kobodl = "kobodl:cli"
 
 [tool.poetry.dependencies]
-python = ">=3.6,<3.11"
+python = ">=3.9,<3.13"
 beautifulsoup4 = "<5.0.0"
 click = "<8"
 dataclasses = "<1.0.0"
@@ -38,6 +38,7 @@ pycryptodome = "<4"
 requests = "^2.25"
 tabulate = "<0.9.0"
 pyperclip = "^1.8.2"
+setuptools = "^75.8.0"
 
 [tool.poetry.dev-dependencies]
 tox = "^3.24.4"