fix docs

chrisjsewell · chrisjsewell · commit 4b8c4c35b988 · 2022-07-04T00:00:34.000+02:00
diff --git a/setup.cfg b/setup.cfg
@@ -48,6 +48,7 @@ testing =
     pytest-cov
     pytest-regressions
 rtd =
+    attrs
     myst-parser~=0.16.1
     sphinx-book-theme~=0.1.0
 
