add pyproject.toml

Author: robertjwilson

pyproject.toml

@@ -0,0 +1,5 @@
+# pyproject.toml
+[build-system]
+# XXX: If your project needs other packages to build properly, add them to this list.
+requires = ["setuptools >= 42.0.0"]
+build-backend = "setuptools.build_meta"