fill in supported Python versions

Author: zacharyburnett

.github/workflows/build.yml

@@ -39,9 +39,12 @@ jobs:
           - ubuntu-latest
           - macos-latest
         python-version:
+          - "3.8"
+          - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
+          - "3.13"
       fail-fast: false
     runs-on: ${{ matrix.runs-on }}
     steps: