Restrict to Python 3.10 or later.

.github/workflows/build.yaml

@@ -7,8 +7,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04, windows-latest]
-        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "pypy3.9", "pypy3.10"]
+        os: [ubuntu-22.04, windows-latest]
+        python-version: ["3.10", "3.11", "3.12", "pypy3.10"]
       max-parallel: 4
 
     steps:

pyproject.toml

@@ -19,17 +19,13 @@ classifiers = [
     "Natural Language :: English",
     "Operating System :: OS Independent",
     "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",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Topic :: Software Development :: Libraries :: Python Modules",
 ]
 
-requires-python = ">= 3.6"
+requires-python = ">= 3.10"
 
 [project.urls]
 Homepage = "http://sh13.net/projects/SJSON"
@@ -43,7 +39,7 @@ build-backend = "hatchling.build"
 [tool.tox]
 legacy_tox_ini = """
 [tox]
-envlist=py36,py37,py38,py39,py310,py311,py312
+envlist=py310,py311,py312
 
 [testenv]
 deps=