Update package metadata supported Python

Author: PProfizi

pyproject.toml

@@ -8,7 +8,7 @@ name = "ansys-dpf-core"
 version = "0.9.1.dev0"
 description = "Data Processing Framework - Python Core "
 readme = "README.md"
-requires-python = ">=3.8, <4"
+requires-python = ">=3.9, <4"
 license = {file = "LICENSE"}
 authors = [
     {name = "ANSYS, Inc.", email = "[email protected]"},