build: remove support for Python 3.9.

Author: henryborchers

.github/workflows/tox_matrix.yml

@@ -24,7 +24,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-2019]
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.10', '3.11', '3.12', '3.13']
         include:
           - os: macos-latest
             compiler_version: 14

CTestConfig.cmake

@@ -5,9 +5,9 @@ library identifier: '[email protected]', retriever: modernSCM(
    ])
 
 
-def SUPPORTED_MAC_VERSIONS = ['3.9', '3.10', '3.11', '3.12', '3.13']
-def SUPPORTED_LINUX_VERSIONS = ['3.9', '3.10', '3.11', '3.12', '3.13']
-def SUPPORTED_WINDOWS_VERSIONS = ['3.9', '3.10', '3.11', '3.12', '3.13']
+def SUPPORTED_MAC_VERSIONS = ['3.10', '3.11', '3.12', '3.13']
+def SUPPORTED_LINUX_VERSIONS = ['3.10', '3.11', '3.12', '3.13']
+def SUPPORTED_WINDOWS_VERSIONS = ['3.10', '3.11', '3.12', '3.13']
 def SHARED_PIP_CACHE_VOLUME_NAME = 'pipcache'
 def installMSVCRuntime(cacheLocation){
     def cachedFile = "${cacheLocation}\\vc_redist.x64.exe".replaceAll(/\\\\+/, '\\\\')

Jenkinsfile

@@ -1,7 +1,5 @@
 build-essential
 python3-pip
-python3.9-dev
-python3.9-venv
 python3.10-dev
 python3.10-venv
 python3.11-dev