Fix a lint issue [skip ci]

adamtheturtle · adamtheturtle · commit 4ee712d15500 · 2018-06-16T18:15:27.000+01:00
diff --git a/src/mock_vws/_validators.py b/src/mock_vws/_validators.py
@@ -23,6 +23,7 @@
 
 from mock_vws._constants import ResultCodes
 from mock_vws._mock_common import json_dump
+
 from ._constants import States
 
 
