docs: Fix types missing from docs (#62)

Author: DenverCoder1

.readthedocs.yml

@@ -2,15 +2,16 @@ version: 2
 formats: []
 
 build:
-  image: latest
+  os: ubuntu-20.04
+  tools:
+    python: "3.11"
 
 sphinx:
   configuration: docs/source/conf.py
-  fail_on_warning: false
+  fail_on_warning: true
   builder: html
 
 python:
-  version: "3.8"
   install:
     - method: pip
       path: .