update python versions to 3.8-3.12

setup.py

@@ -38,14 +38,15 @@ setup(
         'Topic :: Security',
         'License :: OSI Approved :: BSD License',
         'Programming Language :: Python :: 3',
-        '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',
     ],
     keywords='stix stix2 json cti cyber threat intelligence',
     packages=find_packages(exclude=['*.test', '*.test.*']),
-    python_requires='>=3.7',
+    python_requires='>=3.8',
     install_requires=[
         'pytz',
         'requests',

tox.ini

@@ -1,9 +1,8 @@
 [tox]
-envlist = py37,py38,py39,py310,packaging,pre-commit-check
+envlist = py38,py39,py310,py311,py312,packaging,pre-commit-check
 
 [testenv]
 deps =
-  -U
   tox
   pytest
   pytest-cov
@@ -32,7 +31,8 @@ commands =
 
 [gh-actions]
 python =
-  3.7: py37
   3.8: py38
-  3.9: py39, packaging, pre-commit-check
+  3.9: py39
   3.10: py310
+  3.11: py311, packaging, pre-commit-check
+  3.12: py312