support python>=3.9 in pyproject

Author: alejoe91

pyproject.toml

@@ -8,7 +8,7 @@ authors = [
 
 description = "Python package to handle probe layout, geometry and wiring to device."
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 classifiers = [
     "Programming Language :: Python :: 3",
     "License :: OSI Approved :: MIT License",