Merge pull request #29 from ccnmtl/nikolas-patch-4

clean up travis.yml

Author: nikolas

.travis.yml

@@ -2,19 +2,14 @@ language: python
 sudo: false
 python:
 - '2.7'
-- '3.5'
 - '3.6'
 env:
-- DJANGO="Django>=1.8.0,<1.9.0"
 - DJANGO="Django>=1.11,<1.12.0"
-- DJANGO="Django>=2.0,<2.1"
-- DJANGO="Django>=2.1,<2.2"
+- DJANGO="Django>=2.2,<2.3"
 matrix:
   exclude:
   - python: '2.7'
-    env: DJANGO="Django>=2.0,<2.1"
-  - python: '2.7'
-    env: DJANGO="Django>=2.1,<2.2"
+    env: DJANGO="Django>=2.2,<2.3"
 install:
 - pip install $DJANGO
 - pip install flake8