Pin datadiff to latest version 2.0.0

pyup-bot · pyup-bot · commit 58a30af4d5f6 · 2019-02-12T17:48:32.000+01:00
diff --git a/requirements/testing.txt b/requirements/testing.txt
@@ -21,5 +21,5 @@ yamale==1.8.0
 pytest-mock==1.10.1
 
 # local debugging tools
-datadiff
+datadiff==2.0.0
 ipdb
