revert increase version of numpy in jupyter

this partially reverts ba52eead

Numpy version 1.16.4 was not compatible with scipy 0.19.0

software/jupyter/software.cfg

@@ -92,7 +92,7 @@ tornado = 4.4.2
 traitlets = 4.3.2
 widgetsnbextension = 2.0.0
 # numpy >= 1.13.1 is required for numpy.core.multiarray
-numpy = 1.16.4
+numpy = 1.13.1
 
 
 # Required by: