Pin latest traitlets 4.x version

05f48d86 · Thomas Kluyver · f85a6926 · 05f48d86
Commit 05f48d86 authored 4 years ago by Thomas Kluyver
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,5 +36,6 @@ scikit-learn == 0.22.2.post1
 sharedmem == 0.3.7 
 sphinx == 1.8.5
 tabulate == 0.8.6
+traitlets == 4.3.3
 unittest-xml-reporting == 3.0.2
 .