add python 3.13 RC to tox allow fail

.gitlab-ci.yml

@@ -87,6 +87,19 @@ test-3.12-core:
         coverage_format: cobertura
         path: coverage.xml
 
+test-3.13-core:
+  <<: *only-default
+  image: python:3.13-rc-bookworm⁠
+  script:
+    - tox -e py313-core
+  artifacts:
+    when: always
+    reports:
+      coverage_report:
+        coverage_format: cobertura
+        path: coverage.xml
+  allow_failure: true
+
 test-3.10-all:
   <<: *only-default
   image: python:3.10-bookworm
@@ -124,6 +137,19 @@ test-3.12-all:
         coverage_format: cobertura
         path: coverage.xml
 
+test-3.13-all:
+  <<: *only-default
+  image: python:3.13-rc-bookworm⁠
+  script:
+    - tox -e py313-all
+  artifacts:
+    when: always
+    reports:
+      coverage_report:
+        coverage_format: cobertura
+        path: coverage.xml
+  allow_failure: true
+
 build-test:
   stage: test
   image: python:3.12-bookworm

tox.ini

@@ -2,7 +2,7 @@
 isolated_build = true
 skipsdist = true
 usedevelop = true
-envlist = py{310,311,312}-{all,core}, docs
+envlist = py{310,311,312,313}-{all,core}, docs
 
 [testenv]
 setenv =
@@ -12,6 +12,7 @@ basepython =
     py310: python3.10
     py311: python3.11
     py312: python3.12
+    py313: python3.13
 deps=
     coverage
 install_command = pip install -e ".[test]" -U {opts} {packages}