Drop support for EOL Python 3.3

Author: hugovk

.travis.yml

@@ -9,8 +9,6 @@ matrix:
       env: TOXENV=py,codecov
     - python: 3.4
       env: TOXENV=py,codecov
-    - python: 3.3
-      env: TOXENV=py,py-lowest,codecov
     - python: 2.7
       env: TOXENV=py,codecov
     - python: pypy

setup.py

@@ -45,7 +45,6 @@
         'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',

tox.ini

@@ -1,7 +1,7 @@
 [tox]
 envlist =
-    py{36,35,34,33,27,py}
-    py{36,33,27,py}-lowest
+    py{36,35,34,27,py}
+    py{36,34,27,py}-lowest
     docs_html
     coverage_report