Fix Travis CI builds

Python 3.3 builds appear to be no longer supported on Travis CI.
This replaces Python 3.3 with Python 3.7-dev for Travis CI builds.

Author: tleonhardt

.travis.yml

@@ -7,9 +7,6 @@ matrix:
         - os: linux
           python: 2.7
           env: TOXENV=py27
-        - os: linux
-          python: 3.3
-          env: TOXENV=py33
         - os: linux
           python: 3.4
           env: TOXENV=py34
@@ -19,9 +16,9 @@ matrix:
         - os: linux
           python: 3.6
           env: TOXENV=py36
-#        - os: linux
-#          python: 3.7-dev
-#          env: TOXENV=py37
+        - os: linux
+          python: 3.7-dev
+          env: TOXENV=py37
 #        # Warning: Don't try to use code coverage analysis with pypy as it is insanely slow
 #        - os: linux
 #          python: pypy

setup.py

@@ -52,7 +52,6 @@
 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

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py33,py34,py35,py36,py36-winpy37,pypy
+envlist = py27,py34,py35,py36,py36-win,py37
 
 [pytest]
 testpaths = tests
@@ -40,16 +40,6 @@ commands =
   py.test {posargs: -n 2} --cov=cmd2 --cov-report=term-missing
   codecov
 
-[testenv:py33]
-deps =
-  mock
-  pyparsing
-  pyperclip
-  pytest
-  pytest-xdist
-  six
-commands = py.test -v -n2
-
 [testenv:py34]
 deps =
   mock