update python

Author: frivoal

.travis.yml

@@ -1,12 +1,10 @@
 language: python
 sudo: false
 python:
-  - "2.7"
+  - "3.7"
 
 install:
-  # Setup bikeshed. See https://tabatkins.github.io/bikeshed/#install-linux
-  - git clone https://github.com/tabatkins/bikeshed.git
-  - pip install --editable $PWD/bikeshed
+  - pip install bikeshed
   - bikeshed update
 
 script: