Apply suggestions from code review

Author: mathurinm

pyproject.toml

@@ -22,11 +22,10 @@ dependencies = [
 ]
 dynamic = ["version"]
 
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 
 classifiers = [
   "Programming Language :: Python :: 3 :: Only",
-  "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",