Update mock to 3.0.5

requirements.txt

@@ -15,7 +15,7 @@ cssselect==1.1.0
 description-extractor==2.3.5
 interval-binning==1.0.0
 lxml==4.4.1
-mock==1.3.0
+mock==3.0.5
 mockredispy==2.9.0.12
 pyparsing==2.0.5
 pytest==2.9.0