Run 3.13 tests for typed_argument_parser (#487)

Author: JelleZijlstra

.github/workflows/third_party.yml

@@ -236,8 +236,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # 3.13 support: https://github.com/swansonk14/typed-argument-parser/issues/150
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
     runs-on: ubuntu-latest
     timeout-minutes: 60
     steps: