Build docs in Python 3.11 on readthedocs

Closes #389

.readthedocs.yml

@@ -1,22 +1,26 @@
 version: 2
 
+# Set the OS, Python version and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
   configuration: docs/conf.py
 
-# Build documentation with MkDocs
-#mkdocs:
-#  configuration: mkdocs.yml
-
-# Optionally build your docs in additional formats such as PDF
-formats:
-  - pdf
+# Optionally build your docs in additional formats such as PDF and ePub
+# formats:
+#    - pdf
+#    - epub
 
-# Optionally set the version of Python and requirements required to build your docs
+# Optional but recommended, declare the Python requirements required
+# to build your documentation
+# See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
 python:
-  version: 3.8
   install:
     - method: pip
       path: .
       extra_requirements:
-        - docs
+        - docs

docs/changes/389.misc

@@ -0,0 +1 @@
+Build docs in Python 3.11 on readthedocs