Add PyPy 3.11 to test matrix, update GH actions

Author: bittner

.github/workflows/check.yml

@@ -24,7 +24,7 @@ jobs:
         - package
         - docs
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: actions/setup-python@v6
       with:
         python-version: '3.13'

.github/workflows/publish.yml

@@ -13,7 +13,7 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: actions/setup-python@v6
       with:
         python-version: '3.13'

.github/workflows/test.yml

@@ -33,8 +33,9 @@ jobs:
         - pypy-3.8
         - pypy-3.9
         - pypy-3.10
+        - pypy-3.11
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}

tox.ini

@@ -5,7 +5,7 @@ envlist =
     lint
     format
     py3{8,9,10,11,12,13,14}
-    pypy3{8,9,10}
+    pypy3{8,9,10,11}
     package
     docs
     clean