Pin down setuptools_scm: 8.* doesn't write the _version file :(

setup.py

@@ -34,7 +34,7 @@ def run(self):
     ],
     extras_require={
     },
-    setup_requires=["setuptools_scm"],
+    setup_requires=["setuptools_scm<8.0.0"],
     python_requires=">=3.7",
     classifiers=[
     ],