chore: Bump minimal python version to 3.8

Author: georgkrause

pyproject.toml

@@ -8,8 +8,6 @@ classifiers = [
   "Development Status :: 5 - Production/Stable",
   "License :: OSI Approved :: MIT License",
   "Programming Language :: Python :: 3",
-  "Programming Language :: Python :: 3.6",
-  "Programming Language :: Python :: 3.7",
   "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
@@ -18,7 +16,7 @@ classifiers = [
 ]
 dynamic = ["version"]
 
-requires-python = ">= 3.6"
+requires-python = ">= 3.8"
 dependencies = [
   "language-data>=1.2"
 ]