Remove Python 3.8 support

Python 3.8 reached its EOL on 2024-10-07[1].

[1] https://devguide.python.org/versions/

Author: kajinamit

.github/workflows/ci.yaml

@@ -7,7 +7,7 @@ jobs:
     runs-on: blacksmith-4vcpu-ubuntu-2204
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
     steps:
       - name: Check out code from GitHub
         uses: actions/checkout@v4
@@ -26,7 +26,7 @@ jobs:
     runs-on: blacksmith-4vcpu-ubuntu-2204
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
     steps:
       - name: Check out code from GitHub
         uses: actions/checkout@v4

setup.py

@@ -17,10 +17,11 @@
     Programming Language :: Python
     Programming Language :: Python :: 3 :: Only
     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
+    Programming Language :: Python :: 3.13
     Programming Language :: Python :: Implementation :: CPython
     Programming Language :: Python :: Implementation :: PyPy
     License :: OSI Approved :: BSD License
@@ -132,7 +133,7 @@ def run_tests(self):
     platforms=['any'],
     license='BSD',
     classifiers=classifiers,
-    python_requires=">=3.6",
+    python_requires=">=3.9",
     install_requires=reqs('default.txt'),
     setup_requires=setup_requires,
     tests_require=reqs('test.txt'),

tox.ini

@@ -1,7 +1,7 @@
 [tox]
 envlist =
-    {3.8,3.9,3.10,3.11,3.12,3.13,pypy3}-unit
-    {3.8,3.9,3.10,3.11,3.12,3.13,pypy3}-integration-rabbitmq
+    {3.9,3.10,3.11,3.12,3.13,pypy3}-unit
+    {3.9,3.10,3.11,3.12,3.13,pypy3}-integration-rabbitmq
     flake8
     apicheck
     pydocstyle
@@ -25,7 +25,6 @@ commands =
 basepython =
     flake8,apicheck,linkcheck,pydocstyle: python3.13
     pypy3: pypy3.10
-    3.8: python3.8
     3.9: python3.9
     3.10: python3.10
     3.11: python3.11