Test against Python version 3.12. (#37)

* Test against Python version 3.12.

* Specify 3.12 release candidate.

Author: jg-rp

.github/workflows/tests.yaml

@@ -9,7 +9,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12.0-rc.3"]
     steps:
       - uses: actions/checkout@v3
         with:

pyproject.toml

@@ -20,6 +20,7 @@ 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 :: CPython",
   "Programming Language :: Python :: Implementation :: PyPy",
 ]
@@ -65,7 +66,7 @@ lint = "ruff check ."
 typing = "mypy"
 
 [[tool.hatch.envs.test.matrix]]
-python = ["37", "38", "39", "310", "311", "pypy38", "pypy39"]
+python = ["37", "38", "39", "310", "311", "312", "pypy38", "pypy39"]
 
 [tool.hatch.envs.test.scripts]
 test = "pytest {args}"