Merge pull request #210 from darrensmith223/patch-3

Update .travis.yml

Author: Tom Mairs

.travis.yml

@@ -15,7 +15,7 @@ install:
   - pip install -r dev-requirements.txt
   - pip uninstall django --yes
   - pip install -q django$DJANGO_VERSION
-  - pip install coveralls
+  - pip install coveralls==1.7.0
   - pip install -e .
 before_script:
   - flake8 sparkpost test