upgrade Python version

.github/workflows/tests.yml

@@ -14,7 +14,7 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', 'pypy-3.9-7.3.12']
+                python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', 'pypy-3.9-7.3.13']
 
         steps:
             - name: Checkout repository

pyproject.toml

@@ -19,13 +19,13 @@ classifiers = [
     "License :: OSI Approved :: Apache Software License",
     "Natural Language :: English",
     "Programming Language :: Python :: 3",
-    "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"
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
 ]
-requires-python = ">=3.8, <3.13"
+requires-python = ">=3.9, <3.14"
 dependencies = [
     "yarg>=0.1.9",
     "docopt>=0.6.2",

tox.ini

@@ -1,20 +1,20 @@
 [tox]
 isolated_build = true
-envlist = py38, py39, py310, py311, py312, pypy3, flake8
+envlist = py39, py310, py311, py312, py313, pypy3, flake8
 
 [gh-actions]
 python =
-    3.8: py38
     3.9: py39
     3.10: py310
     3.11: py311
     3.12: py312
-    pypy-3.9-7.3.12: pypy3
+    3.13: py313
+    pypy-3.9-7.3.13: pypy3
 
 [testenv]
 setenv =
     PYTHONPATH = {toxinidir}:{toxinidir}/pipreqs
-commands = 
+commands =
     python -m unittest discover
 
 [testenv:flake8]
@@ -28,4 +28,4 @@ exclude =
     tests/_data_duplicated_deps/
     tests/_data_ignore/
     tests/_invalid_data/
-max-line-length = 120
+max-line-length = 120