Updated requirements to 2.7 & 3.4-3.7.

Mainly due to test failures of a required import on 3.3.

Author: ahknight

README.rst

@@ -20,7 +20,7 @@ See the original project_, original Python module_, original spec_, and `current
 Requirements
 ------------
 
-* Python 2.7, 3.3-3.6
+* Python 2.7, 3.4-3.7
 * PyCryptodome_
 
 Optional:
@@ -34,7 +34,7 @@ For testing:
 
 * tox
 * pyenv (optional, handy way to access multiple versions)
-    $ for VERS in 2.7.14 3.3.7 3.4.8 3.5.5 3.6.4; do pyenv install -s $VERS; done
+    $ for VERS in 2.7.15 3.4.9 3.5.6 3.6.7 3.7.1; do pyenv install -s $VERS; done
 
 Usage
 -----

setup.py

@@ -20,10 +20,10 @@
         "Operating System :: OS Independent",
         "Programming Language :: Python",
         "Programming Language :: Python :: 2.7",
-        "Programming Language :: Python :: 3.3",
         "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
         "Topic :: Internet :: WWW/HTTP",
         "Topic :: Software Development :: Libraries :: Python Modules",
     ],

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27, py33, py34, py35, py36
+envlist = py27, py34, py35, py36, py37
 
 [testenv]
 commands = python setup.py test