Update .travis.yml

Author: cclauss

.travis.yml

@@ -13,7 +13,8 @@ install:
 before_script:
   # 1) stop the build if there are Python syntax errors or undefined names
   # 2) exit-zero treats all errors as warnings.  The GitHub editor is 127 chars wide
-  - if [[ $TRAVIS_PYTHON_VERSION == 3.6 ]]; then
+  # - if [[ $TRAVIS_PYTHON_VERSION == 3.6 ]]; then
+  - if [[ $TRAVIS_PYTHON_VERSION == 2.7 ]]; then
       pip install flake8;
       flake8 . --count --exit-zero --select=E901,E999,F821,F822,F823 --show-source --statistics;
       flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics;