Pin numpydoc to pre-0.8 to fix dev docs formatting

jni · jni · commit bf3f3d85151b · 2019-05-10T20:12:24.000+10:00
See numpy/numpydoc#215 (comment) for more.
diff --git a/requirements/docs.txt b/requirements/docs.txt
@@ -1,7 +1,7 @@
 # Sphinx 1.7.8 has a bug when building on cached envs
 # https://github.com/sphinx-doc/sphinx/issues/5361
 sphinx>=1.3,!=1.7.8
-numpydoc>=0.6
+numpydoc>=0.7,<0.8
 sphinx-gallery
 sphinx-copybutton
 pytest-runner
