Test against latest pytest versions

Author: vitalk

.travis.yml

@@ -15,6 +15,8 @@ env:
   - PYTEST=2.7.0
   - PYTEST=2.7.1
   - PYTEST=2.7.2
+  - PYTEST=2.7.3
+  - PYTEST=2.8.0
 
 install:
   - pip install -q pytest==$PYTEST