Squashed 'SpiffWorkflow/' changes from 8d820dce1..5d35f5c50

5d35f5c50 Quick fix on the readthedocs.

git-subtree-dir: SpiffWorkflow
git-subtree-split: 5d35f5c50d06e35b17c7e045fcf6000a6e16d8b6

.readthedocs.yml

@@ -1,16 +1,19 @@
 # .readthedocs.yaml
 # Read the Docs configuration file
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
-
+version: 2
 
 build:
-  image: latest
+  os: ubuntu-20.04
+  tools:
+    python: "3.10"
 
 # Optionally build your docs in additional formats such as PDF
 formats: []
 
 python:
-  pip_install: true
-  version: 3.10
+  install:
+    - method: pip
+      path: .
       extra_requirements:
         - docs