Fixed travis 2.7 tests

Author: syrusakbary

.travis.yml

@@ -20,6 +20,7 @@ before_install:
 install:
 - pip install -e .[test]
 script:
+- flake8
 - py.test --cov=graphql graphql tests
 after_success:
 - coveralls
@@ -35,11 +36,6 @@ matrix:
     - pip install pytest-asyncio
     script:
     - py.test --cov=graphql graphql tests tests_py35
-  - python: '2.7'
-    install: pip install flake8
-    script:
-    - flake8
-    - py.test --cov=graphql graphql tests
 deploy:
   provider: pypi
   user: syrusakbary