update rtd config

docs/_templates/layout.html

@@ -0,0 +1,10 @@
+{% extends "!layout.html" %}
+{% block footer %} {{ super() }}
+
+<style>
+    .wy-nav-content {
+        max-width: 960px;
+    }
+</style>
+
+{% endblock %}

docs/requirements.txt

@@ -1,4 +1,9 @@
 sphinx>=4.0
 sphinx-rtd-theme
 sphinxemoji
-sphinx-copybutton
+sphinx-copybutton
+
+assertpy>=1.1
+mypy>=0.910
+typing>=3.7.4.3
+pyyaml>=5.4.1

readthedocs.yaml

@@ -0,0 +1,11 @@
+# .readthedocs.yml
+
+version: 2
+
+sphinx:
+  configuration: docs/conf.py
+
+python:
+  version: 3.8
+  install:
+    - requirements: docs/requirements.txt