Add Python 3.13 to test matrix

Author: eht16

.github/workflows/tests.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-22.04
     strategy:
       matrix:
-        python: ['3.11', '3.12']
+        python: ['3.11', '3.12', '3.13']
       fail-fast: false
 
     steps:

tox.ini

@@ -4,7 +4,7 @@
 [tox]
 skip_missing_interpreters = true
 envlist =
-    docs,py311,py312
+    docs,py311,py312,py313
 
 logstash_async_modules = logstash_async tests