Tweak rtd

Author: Tinche

.readthedocs.yml

@@ -4,10 +4,11 @@ build:
   os: ubuntu-20.04
   tools:
     # Keep version in sync with tox.ini (docs and gh-actions).
-    python: "3.10"
+    python: "3.11"
 
 python:
-  install:
-    - requirements: "docs/requirements.txt"
-    - path: .
-      method: pip
+  jobs:
+    post_create_environment:
+      - pip install pdm
+    post_install:
+      - pdm install -G :all,docs

tox.ini

@@ -4,8 +4,8 @@ python =
     3.7: py37
     3.8: py38
     3.9: py39
-    3.10: py310, lint
-    3.11: py311
+    3.10: py310
+    3.11: py311, lint
     pypy-3: pypy3
 
 [tox]
@@ -14,7 +14,7 @@ isolated_build = true
 skipsdist = true
 
 [testenv:lint]
-basepython = python3.10
+basepython = python3.11
 allowlist_externals =
     make
     pdm
@@ -44,7 +44,7 @@ commands =
 passenv = CI
 
 [testenv:docs]
-basepython = python3.10
+basepython = python3.11
 setenv =
     PYTHONHASHSEED = 0
 deps =