tests: support python releases before 3.7

.travis.yml

@@ -1,9 +1,8 @@
 language: python
 python:
     - 2.7
-    - 3.4
-    - 3.5
     - 3.6
+    - 3.7
     - pypy
 install: pip install coveralls tox-travis
 script: tox

README.rst

@@ -75,7 +75,7 @@ Dependency
 For nodeenv
 ^^^^^^^^^^^
 
-* python (2.6+, 3.3+, or pypy)
+* python (2.6+, 3.5+, or pypy)
 * make
 * tail
 

tests/nodeenv_test.py

@@ -3,6 +3,7 @@
 
 import os.path
 import pipes
+import shutil
 import subprocess
 import sys
 import sysconfig

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 # These should match the travis env list
-envlist = py27,py34,py35,py36,pypy
+envlist = py27,py36,py37,pypy
 
 [testenv]
 install_command = pip install {opts} {packages}