update requirement.txt

“mahdis-z” · “mahdis-z” · commit 2fd565e6d653 · 2019-10-17T14:12:23.000-04:00
diff --git a/requirements.txt b/requirements.txt
@@ -1,4 +1,4 @@
-plotly==4.1.1
+plotly==4.2.0
 jupytext==1.1.1
 jupyter
 notebook
