Update django-filter from 1.0.4 to 1.1.0 (#2850)

requirements/common.txt

@@ -173,9 +173,9 @@ python-dateutil==2.6.1 \
 requests-hawk==1.0.0 --hash=sha256:c2626ab31ebef0c81b97781c44c2275bfcc6d8e8520fc4ced495f0f386f8fe26
 
 # djangorestframework-filters doesn't yet support django-filter 1.x.
-django-filter==1.0.4 \
-    --hash=sha256:6ef1611aeacfda8f13a075a992ff65687afbd5cc8fcb0f3f1563a9ad4fe2d1b0 \
-    --hash=sha256:e44620d4e707beaff7396ac8df765dc015a07467df813b9c1663fe4017934b58
+django-filter==1.1.0 \
+    --hash=sha256:ea204242ea83790e1512c9d0d8255002a652a6f4986e93cee664f28955ba0c22 \
+    --hash=sha256:ec0ef1ba23ef95b1620f5d481334413700fb33f45cd76d56a63f4b0b1d76976a
 
 djangorestframework-filters==0.10.1 \
     --hash=sha256:87a292cb884117b7c142125460230f88d6928c427e69f645b8287e303cf03d30