Temporarily restrict setuptools to <= 73.0

CFFI is currently broken with setuptools 74.0, see python-cffi/cffi#118

Author: nhusung

pyproject.toml

@@ -39,7 +39,7 @@ Repository = "https://github.com/OxiDD/oxidd"
 Issues = "https://github.com/OxiDD/oxidd/issues"
 
 [build-system]
-requires = ["setuptools >= 61.0", "setuptools_scm >= 8"]
+requires = ["setuptools >= 61.0, <= 73.0", "setuptools_scm >= 8"]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools]