fixing CI

Author: nicolaskruchten

packages/python/plotly/tox.ini

@@ -57,7 +57,7 @@ deps=
     pytz==2016.10
     retrying==1.3.3
     pytest==3.5.1
-    pandas==0.24.2
+    pandas==1.0.3
     xarray==0.10.9
     statsmodels==0.10.2
     backports.tempfile==1.0