Adding new django version to test matrix

Author: carlio

.travis.yml

@@ -12,6 +12,7 @@ env:
   - DJANGO='Django>=1.7,<1.8' SKIP='2.6'
   - DJANGO='Django>=1.8,<1.9' SKIP='2.6'
   - DJANGO='Django>=1.9,<1.10' SKIP='2.6'
+  - DJANGO='Django>=1.10,<1.11' SKIP='2.6'
 install:
   scripts/travis-install.sh
 script: