Fix CI and update Python versions to test

Author: jimporter

.github/workflows/build.yml

@@ -11,11 +11,11 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
         include:
-          - {os: ubuntu-20.04, python-version: '3.6'}
-        exclude:
-          - {os: macos-latest, python-version: '3.7'}
+          - {os: ubuntu-22.04, python-version: '3.6'}
+          - {os: ubuntu-22.04, python-version: '3.7'}
+          - {os: ubuntu-24.04, python-version: '3.8'}
       fail-fast: false
 
     steps: