Add tox configuration to test across environments

setup.py

@@ -44,14 +44,11 @@ def read(fname):
         "License :: OSI Approved :: BSD License",
         "Operating System :: MacOS :: MacOS X",
         "Programming Language :: C",
-        "Programming Language :: Python :: 2.4",
-        "Programming Language :: Python :: 2.5",
-        "Programming Language :: Python :: 2.6",
-        "Programming Language :: Python :: 2.7",
-        "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",
         "Topic :: System :: Filesystems",
     ],

tox.ini

@@ -0,0 +1,39 @@
+[tox]
+minversion = 3.18
+envlist =
+    lint
+    py38
+    py39
+    py310
+    py311
+    py312
+
+[testenv]
+usedevelop = true
+deps =
+    build
+    wheel
+    pytest
+    setuptools
+commands =
+    python -m unittest -v
+extras =
+    test
+setenv =
+    LOGNAME=dummy
+
+[testenv:lint]
+basepython = python3
+skip_install = true
+commands =
+    isort --check-only --diff .
+    flake8 *.py
+    check-manifest
+    check-python-versions
+deps =
+    check-manifest
+    check-python-versions >= 0.19.1
+    wheel
+    flake8
+    isort
+