language: python
python:
  - "2.7"
  - "3.3"
  - "3.4"
  - "3.5"
install: make deps
script: make test

language: python
python:
  - "2.7"
  - "3.4"
  - "3.5"
  - "3.6"
  - "3.7"
install: make deps
script: make test

Add Python 3.6, 3.7 and drop 3.3 support
Add Python 3.6, 3.7 and drop 3.3 support