- relax dependency requirements

Index: pyproject.toml
--- pyproject.toml.orig
+++ pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=45, <=70.0.0", "setuptools-scm[toml]>=6.2, <=8.1.0"]  # pin max versions of build deps and update as needed
+requires = ["setuptools", "setuptools-scm[toml]"]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools_scm]
