Drop python 3.9 support

(#203)

Author: femarchi

pyproject.toml

@@ -8,7 +8,7 @@ version = "0.3.dev0"
 authors = [{ name="ANSYS, Inc.", email="[email protected]" }]
 description = "Python client library for Ansys Rocky"
 readme = "README.rst"
-requires-python = ">=3.9,<4"
+requires-python = ">=3.10,<4"
 license = { file = "LICENSE" }
 classifiers = [
     "Development Status :: 4 - Beta",