github/workflows: add Python 3.13 to the test matrix
diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index e42deb0..6fa8cfb 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -17,6 +17,7 @@
           - "3.10"
           - "3.11"
           - "3.12"
+          - "3.13"
         os:
           - macos
           - ubuntu