Drop Python 3.8 support.

Python 3.8 was EOL on 2024-10-07 (see https://devguide.python.org/versions/).

See https://github.com/nmlorg/metabot/actions/runs/11828441666/job/32959263533 (pylint-dev/pylint#9774).

.github/workflows/pythonpackage.yml

@@ -9,12 +9,12 @@ jobs:
     strategy:
       fail-fast: false
       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@v2
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install

pyproject.toml

@@ -6,7 +6,7 @@ readme = 'README.md'
 authors = [
     {name = 'Daniel Reed', email = '[email protected]'},
 ]
-requires-python = '>=3.8'
+requires-python = '>=3.9'
 dependencies = [
     'googlemaps',
     'ntelebot >= 0.4.4',