new config file format is required

Author: maxbelanger

.readthedocs.yml

@@ -1,5 +1,16 @@
-# .readthedocs.yml
+# .readthedocs.yaml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
 
-# Don't build any extra formats
-# https://docs.readthedocs.io/en/latest/yaml-config.html#formats
-formats: []
+# Required
+version: 2
+
+# Set the version of Python and other tools you might need
+build:
+  os: ubuntu-20.04
+  tools:
+    python: "3.7"
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  configuration: docs/conf.py