setup/lint-and-test: Add initial CPython 3.12 testing support.

Author: neiljp

.github/workflows/lint-and-test.yml

@@ -203,6 +203,7 @@ jobs:
           - {PYTHON: 3.9, OS: ubuntu-latest, NAME: "CPython 3.9 (ubuntu)", EXPECT: "Linux"}
           - {PYTHON: "3.10", OS: ubuntu-latest, NAME: "CPython 3.10 (ubuntu)", EXPECT: "Linux"}
           - {PYTHON: "3.11", OS: ubuntu-latest, NAME: "CPython 3.11 (ubuntu)", EXPECT: "Linux"}
+          - {PYTHON: "3.12-dev", OS: ubuntu-latest, NAME: "CPython 3.12 (ubuntu)", EXPECT: "Linux"}
           - {PYTHON: 'pypy-3.7', OS: ubuntu-latest, NAME: "PyPy 3.7 (ubuntu)", EXPECT: "Linux"}
           - {PYTHON: 'pypy-3.8', OS: ubuntu-latest, NAME: "PyPy 3.8 (ubuntu)", EXPECT: "Linux"}
           - {PYTHON: 'pypy-3.9', OS: ubuntu-latest, NAME: "PyPy 3.9 (ubuntu)", EXPECT: "Linux"}

setup.py

@@ -68,6 +68,7 @@ def long_description():
         "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",
     ],
@@ -77,7 +78,7 @@ def long_description():
         "Issues": "https://github.com/zulip/zulip-terminal/issues",
         "Hot Keys": "https://github.com/zulip/zulip-terminal/blob/main/docs/hotkeys.md",
     },
-    python_requires=">=3.7, <3.12",
+    python_requires=">=3.7, <3.13",
     keywords="",
     packages=find_packages(exclude=["tests", "tests.*"]),
     zip_safe=True,