chore: Add singledispatch into requirements.txt

abawchen · abawchen · commit 25265b9f9f18 · 2018-01-29T09:52:56.000+08:00
diff --git a/requirements.txt b/requirements.txt
@@ -2,4 +2,5 @@ graphene==2.0.1
 iso8601==0.1.12
 mongoengine==0.15.0
 mongomock==3.8.0
+singledispatch==3.4.0.3
 
