Add support for Python 3.13 (#4296)

Author: nateprewitt

.changes/next-release/enhancement-Python-91279.json

@@ -0,0 +1,5 @@
+{
+  "type": "enhancement",
+  "category": "Python",
+  "description": "Added provisional Python 3.13 support to Boto3"
+}

.github/workflows/run-crt-test.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13-dev']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
         os: [ubuntu-latest, macOS-latest, windows-latest]
         # Python 3.8 and 3.9 do not run on m1 hardware which is now standard for
         # macOS-latest.
@@ -32,6 +32,8 @@ jobs:
         uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3
         with:
           python-version: '${{ matrix.python-version }}'
+          cache: 'pip'
+          allow-prereleases: true
       - name: Install dependencies and CRT
         run: |
           python scripts/ci/install --extras crt

.github/workflows/run-tests.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13-dev"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
         os: [ubuntu-latest, macOS-latest, windows-latest]
         # Python 3.8 and 3.9 do not run on m1 hardware which is now standard for
         # macOS-latest.
@@ -33,6 +33,8 @@ jobs:
       uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3
       with:
         python-version: ${{ matrix.python-version }}
+        cache: 'pip'
+        allow-prereleases: true
     - name: Install dependencies
       run: |
         python scripts/ci/install

setup.py

@@ -52,6 +52,7 @@ def get_version():
         'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: 3.12',
+        'Programming Language :: Python :: 3.13',
     ],
     project_urls={
         'Documentation': 'https://boto3.amazonaws.com/v1/documentation/api/latest/index.html',

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py38,py39,py310,py311,py312
+envlist = py38,py39,py310,py311,py312,py313
 
 # Comment to build sdist and install into virtualenv
 # This is helpful to test installation but takes extra time