Drop 3.8 classifier

Author: stefanvanburen

pyproject.toml

@@ -10,7 +10,6 @@ license = { file = "LICENSE" }
 keywords = ["validate", "protobuf", "protocol buffer"]
 requires-python = ">=3.9"
 classifiers = [
-  "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",