Run Travis tests on Python 3.4-3.6 (#63)

* Run Travis tests on Python 3.4-3.6

* Update PyPI classifiers to note Python 3.3, 3.5, 3.6 support

* Remove special case installing flake8 3

`requirements-dev.txt` is now specifies flake8 3 anyway, so this special case does not affect the CI build.

* Drop Python 3.3 from Travis build

* Remove Python 3.3 from PyPI classifier

.travis.yml

@@ -2,19 +2,14 @@ sudo: false
 language: python
 python:
   - "2.7"
-  - "3.3"
-matrix:
-  include:
-    - python: "3.3"
-      env: FLAKE8_VERSION=3
+  - "3.4"
+  - "3.5"
+  - "3.6"
 
 install:
   # Install our dependencies
   - pip install -r requirements-dev.txt
 
-  # If we are testing Flake8 3.x, then install it
-  - if test "$FLAKE8_VERSION" = "3"; then pip install flake8==3; fi
-
   # Install `flake8-quotes`
   - python setup.py develop
 

setup.py

@@ -56,6 +56,8 @@ def read(*filenames, **kwargs):
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
         'Topic :: Software Development :: Libraries :: Python Modules',
         'Topic :: Software Development :: Quality Assurance',
     ]