Update dependency to python 3.9 (black requires python >=3.9)

Signed-off-by: Thomas Günther <[email protected]>

Author: tom-hg57

.github/workflows/docs.yaml

@@ -28,7 +28,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: '3.9'
 
       - name: Install Graphviz
         shell: bash

.github/workflows/pre-commit.yaml

@@ -9,5 +9,5 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: '3.8'
+          python-version: '3.9'
       - uses: pre-commit/[email protected]

.github/workflows/test.yaml

@@ -17,7 +17,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: '3.9'
 
       - name: Install Python dependencies
         run: |
@@ -44,7 +44,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: '3.9'
 
       - name: Install Graphviz
         shell: bash

pyproject.toml

@@ -15,17 +15,17 @@ dependencies = [
     "chevron",
 ]
 
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 
 classifiers = [
   "Development Status :: 5 - Production/Stable",
 
   "License :: OSI Approved :: Apache Software License",
 
-  "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
-  "Programming Language :: Python :: 3.11"
+  "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
 ]
 
 [project.urls]
@@ -55,6 +55,5 @@ build-backend = "setuptools.build_meta"
 [tool.setuptools]
 include-package-data = true
 
-
 [tool.black]
 line-length = 120