Drop support for EOL Python 3.4 (#421)

Author: hugovk

.appveyor.yml

@@ -6,8 +6,6 @@ environment:
   matrix:
     - TOXENV: py27-base
     - TOXENV: py27-optional
-    - TOXENV: py34-base
-    - TOXENV: py34-optional
     - TOXENV: py35-base
     - TOXENV: py35-optional
     - TOXENV: py36-base

.travis.yml

@@ -4,7 +4,6 @@ python:
   - "pypy"
   - "3.6"
   - "3.5"
-  - "3.4"
   - "2.7"
 
 cache: pip

setup.py

@@ -66,7 +66,6 @@ def default_environment():
     'Programming Language :: Python :: 2',
     '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',
@@ -104,6 +103,7 @@ def default_environment():
           'six>=1.9',
           'webencodings',
       ],
+      python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*",
       extras_require={
           # A conditional extra will only install these items when the extra is
           # requested and the condition matches.

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = {py27,py34,py35,py36,pypy}-{base,six19,optional}
+envlist = {py27,py35,py36,pypy}-{base,six19,optional}
 
 [testenv]
 deps =