ReadTheDocs requires configuration so make it happy.

anthony-tuininga · anthony-tuininga · commit fde9ec78fcd5 · 2021-11-04T15:57:32.000-06:00
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
@@ -0,0 +1,9 @@
+version: 2
+
+sphinx:
+  configuration: doc/src/conf.py
+
+python:
+  version: 3.9
+  install:
+    - requirements: doc/requirements.txt
diff --git a/doc/requirements.txt b/doc/requirements.txt
@@ -0,0 +1,2 @@
+sphinx==3.4.3
+sphinx_rtd_theme==0.5.1
