Update dependency pyscaffold to v4

setup.py

@@ -24,7 +24,7 @@ def setup_package():
     needs_sphinx = {"build_sphinx", "upload_docs"}.intersection(sys.argv)
     sphinx = ["sphinx"] if needs_sphinx else []
     setup(
-        setup_requires=["pyscaffold>=3.3,<3.4"] + sphinx,
+        setup_requires=["pyscaffold>=4.5,<4.6"] + sphinx,
         entry_points=entry_points,
         use_pyscaffold=True,
     )