Decrease minor version warning to 4.2

Carreau · Carreau · commit 8472f0dd9d80 · 2015-12-21T13:29:34.000+01:00
diff --git a/IPython/testing/iptest.py b/IPython/testing/iptest.py
@@ -63,7 +63,7 @@
 warnings.filterwarnings('default', message='.*', category=Warning, module='IPy.*')
 
 
-if version_info < (5,):
+if version_info < (4,2):
     # ignore some warnings from traitlets until 6.0
     warnings.filterwarnings('ignore', message='.*on_trait_change is deprecated: use observe instead.*')
     warnings.filterwarnings('ignore', message='.*was set from the constructor.*', category=Warning, module='IPython.*')
