rewrite julia version in notebooks to one compatible with binder

Fixes #388
3 jobs for mk-fix-binder in 9 minutes and 32 seconds
Status Name Job ID Coverage
  Test Basic
passed docker:v1.6 #303295

00:07:14

passed format #303294
privileged

00:02:02

 
  Documentation
passed doc-tests:v1.6 #303296

00:02:17