Update yamale from 1.8.1 to 1.9.0

pyup-bot · pyup-bot · commit 5b465510c397 · 2019-03-11T20:17:14.000+01:00
diff --git a/requirements/testing.txt b/requirements/testing.txt
@@ -21,7 +21,7 @@ execnet==1.5.0
 # (Pinned to 4.4.2 since what we need for testing is still useful)
 Mercurial==4.4.2  # pyup: ignore
 
-yamale==1.8.1
+yamale==1.9.0
 pytest-mock==1.10.1
 
 # local debugging tools
