build: bump Python versions

.travis.yml

@@ -18,14 +18,15 @@ script:
 jobs:
   include:
     - stage: Build-Test
-      python: '3.8'
+      python: '3.9'
     - python: '3.10'
     - python: '3.11'
     - python: '3.12'
-
+    - python: '3.13'
+
     - name: Detect-Secrets
       language: python
-      python: '3.12'
+      python: '3.13'
       install:
         - pip install --upgrade "git+https://github.com/ibm/detect-secrets.git@master#egg=detect-secrets"
       script:
@@ -42,7 +43,7 @@ jobs:
         - npm run semantic-release
 
     - stage: Publish-Release
-      python: "3.8"
+      python: "3.9"
       name: Publish-To-PyPi
       script:
         - make ci

README.md

@@ -9,7 +9,7 @@ This project contains core functionality required by Python code generated by th
 (openapi-sdkgen).
 
 # Python Version
-The current minimum Python version supported is 3.8.
+The current minimum Python version supported is 3.9.
 
 ## Installation
 

pyproject.toml

@@ -6,15 +6,15 @@ authors = [
 ]
 description = "Core library used by SDKs for IBM Cloud Services"
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 classifiers = [
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "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",
     "Development Status :: 5 - Production/Stable",
     "Environment :: Console",
     "Intended Audience :: Developers",