ci(tests): update the targeted python versions for testing

- Drop testing under python 2.7. It's no longer easy to access on the
  github runners. (Though we still test under pypy2.7.)

- Test under python 3.12

.github/workflows/tests.yml

@@ -14,10 +14,8 @@ jobs:
       fail-fast: false
       matrix:
         runner: [ubuntu-latest]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", pypy-2.7, pypy-3.7]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", pypy-2.7, pypy-3.8, pypy-3.10]
         include:
-          - python-version: "2.7"
-            runner: ubuntu-20.04
           - python-version: "3.6"
             runner: ubuntu-20.04
 

setup.cfg

@@ -19,6 +19,7 @@ classifiers =
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
     Programming Language :: Python :: Implementation :: PyPy
     Topic :: Software Development :: Libraries :: Python Modules
 
@@ -29,6 +30,7 @@ package_dir =
 setup_requires =
     setuptools >= 40
     setuptools_scm
+python_requires = >=2.7.0,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*
 
 [bdist_wheel]
 universal = 1

tox.ini

@@ -1,7 +1,8 @@
 [tox]
 minversion = 3.7
 envlist =
-    py27,py36,py37,py38,py39,py310,py311,pypy2,pypy3
+    py{27,36,37,38,39,310,311,312}
+    pypy{27,38,310}
     cover-{clean,report}
     lint
 # necessary for python <= 3.6, pypy
@@ -17,8 +18,12 @@ python =
     3.7: py37
     3.8: py38
     3.9: py39
+    3.10: py310
+    3.11: py311
+    3.12: py312
     pypy-2.7: pypy2
-    pypy-3.7: pypy3
+    pypy-3.8: pypy38
+    pypy-3.10: pypy310
 
 [testenv]
 deps =
@@ -29,8 +34,8 @@ commands =
     pytest --doctest-modules --doctest-glob=README.md README.md src
 
 depends:
-    py27,py36,py37,py38,py39,py310,py311,pypy2,pypy3: cover-clean
-    cover-report: py27,py36,py37,py38,py39,py310,py311,pypy2,pypy3
+    {py,pypy}{27,36,37,38,39,310,311,312}: cover-clean
+    cover-report: {py,pypy}{27,36,37,38,39,310,311,312}
 
 [testenv:cover-clean]
 skip_install = true