Drop support for python 3.8 and add support for 3.13 in python generator templates

Author: 4c0n

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PythonClientCodegen.java

@@ -428,7 +428,7 @@ public String generatePackageName(String packageName) {
 
     @Override
     public String generatorLanguageVersion() {
-        return "3.8+";
+        return "3.9+";
     }
 
     @Override

modules/openapi-generator/src/main/resources/python/github-workflow.mustache

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
       - uses: actions/checkout@v4

modules/openapi-generator/src/main/resources/python/gitlab-ci.mustache

@@ -14,9 +14,6 @@ stages:
    - pip install -r test-requirements.txt
    - pytest --cov={{{packageName}}}
 
-pytest-3.8:
-  extends: .pytest
-  image: python:3.8-alpine
 pytest-3.9:
   extends: .pytest
   image: python:3.9-alpine
@@ -29,3 +26,6 @@ pytest-3.11:
 pytest-3.12:
   extends: .pytest
   image: python:3.12-alpine
+pytest-3.13:
+  extends: .pytest
+  image: python:3.13-alpine

modules/openapi-generator/src/main/resources/python/pyproject.mustache

@@ -10,7 +10,7 @@ keywords = ["OpenAPI", "OpenAPI-Generator", "{{{appName}}}"]
 include = ["{{packageName}}/py.typed"]
 
 [tool.poetry.dependencies]
-python = "^3.8"
+python = "^3.9"
 
 urllib3 = ">= 2.1.0, < 3.0.0"
 python-dateutil = ">= 2.8.2"

modules/openapi-generator/src/main/resources/python/setup.mustache

@@ -12,7 +12,7 @@ from setuptools import setup, find_packages  # noqa: H301
 # http://pypi.python.org/pypi/setuptools
 NAME = "{{{projectName}}}"
 VERSION = "{{packageVersion}}"
-PYTHON_REQUIRES = ">= 3.8"
+PYTHON_REQUIRES = ">= 3.9"
 REQUIRES = [
     "urllib3 >= 2.1.0, < 3.0.0",
     "python-dateutil >= 2.8.2",

modules/openapi-generator/src/main/resources/python/travis.mustache

@@ -1,13 +1,13 @@
 # ref: https://docs.travis-ci.com/user/languages/python
 language: python
 python:
-  - "3.8"
   - "3.9"
   - "3.10"
   - "3.11"
   - "3.12"
+  - "3.13"
   # uncomment the following if needed
-  #- "3.12-dev"  # 3.12 development branch
+  #- "3.13-dev"  # 3.13 development branch
   #- "nightly"  # nightly build
 # command to install dependencies
 install: