Update .travis.yml

Author: prateekiiest

.travis.yml

@@ -9,22 +9,15 @@ sudo: false
 python:
   - "2.6"
   - "2.7"
-  - "3.2"
-  - "3.3"
-  - "3.4"
-  - "3.5"
-  - "3.5-dev" # 3.5 development branch
-  - "3.6"
-  - "3.6-dev" # 3.6 development branch
-  - "3.7-dev" # 3.7 development branch
-  - "nightly"
+ 
 
 # command to install dependencies
 
 install:
   - pip install -r requirements.txt
+  
 # command to run tests    
 
 
 script:
-  - pytest # or py.test for Python versions 3.5 and below
+  - py.test # or py.test for Python versions 3.5 and below