Update config to drop py3.7 and add 3.12

Update configs to add 3.12.0rc1 to build matrix.

Also update requires-python data.

.github/workflows/build.yaml

@@ -43,7 +43,7 @@ jobs:
         # any additional builds for windows and macos
         # handled via `include` to avoid an over-large test matrix
         os: [ubuntu-latest]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12-dev", "pypy-3.9"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "pypy-3.9"]
         include:
           - os: windows-latest
             python-version: "3.x"
@@ -56,6 +56,7 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
+          allow-prereleases: true
       - name: install tox
         run: python -m pip install -U tox
       - name: test

pyproject.toml

@@ -17,7 +17,7 @@ license = {text = "BSD-2-Clause"}
 authors = [
   { name = "Stephen Rosen", email = "[email protected]" },
 ]
-requires-python = ">=3.6"
+requires-python = ">=3.8"
 classifiers=[
   "Development Status :: 4 - Beta",
   "Environment :: Console",
@@ -26,12 +26,11 @@ classifiers=[
   "Operating System :: OS Independent",
   "Programming Language :: Python",
   "Programming Language :: Python :: 3 :: Only",
-  "Programming Language :: Python :: 3.6",
-  "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",
   "Programming Language :: Python :: Implementation :: CPython",
   "Programming Language :: Python :: Implementation :: PyPy",
   "Topic :: Software Development :: Libraries",

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist=py{37,38,39,310,311}{,-nocov},pypy,docs,lint
+envlist=py{38,39,310,311,312}{,-nocov},pypy,docs,lint
 
 [testenv]
 passenv = CI