drop support for Python 3.4

https://devguide.python.org/devcycle/#end-of-life-branches

.travis.yml

@@ -10,8 +10,6 @@ matrix:
   include:
     - python: 2.7
       env: TOXENV=py27
-    - python: 3.4
-      env: TOXENV=py34
     - python: 3.5
       env: TOXENV=py35
     - python: 3.6

CHANGES.rst

@@ -7,6 +7,7 @@ CHANGES
 - update language models (uchardet)
 - add iso8859-2 test but disabled it
 - support Python 3.8
+- drop support for Python 3.4
 
 2.1.4 (2018-09-27)
 ------------------

appveyor.yml

@@ -1,14 +1,11 @@
 environment:
   matrix:
     - PYTHON: "C:\\Python27"
-    - PYTHON: "C:\\Python34"
     - PYTHON: "C:\\Python35"
     - PYTHON: "C:\\Python36"
     - PYTHON: "C:\\Python37"
     - PYTHON: "C:\\Python38"
     - PYTHON: "C:\\Python27-x64"
-    - PYTHON: "C:\\Python34-x64"
-      DISTUTILS_USE_SDK: "1"
     - PYTHON: "C:\\Python35-x64"
     - PYTHON: "C:\\Python36-x64"
     - PYTHON: "C:\\Python37-x64"

dockerfiles/buildwheel.sh

@@ -4,7 +4,7 @@ set -e -x
 ARCH=`uname -p`
 echo "arch=$ARCH"
 
-for V in cp38-cp38m cp37-cp37m cp36-cp36m cp35-cp35m cp34-cp34m cp27-cp27m cp27-cp27mu; do
+for V in cp38-cp38m cp37-cp37m cp36-cp36m cp35-cp35m cp27-cp27m cp27-cp27mu; do
     PYBIN=/opt/python/$V/bin
     rm -rf build src/cchardet/__pycache__ src/cchardet/*.cpp src/cchardet/*.pyc src/cchardet/*.so src/cchardet.egg-info src/tests/__pycache__ src/tests/*.pyc
     $PYBIN/pip install -r requirements-dev.txt

dockerfiles/develop/Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.4-wheezy
+FROM python:3.8-buster
 
 RUN pip install -U cython chardet nose
 

dockerfiles/slim/Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.4-slim
+FROM python:3.8-slim-buster
 
 ENV BUILD_DEPS gcc g++
 

setup.py

@@ -131,7 +131,6 @@ setup(
         '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',
         'Programming Language :: Python :: 3.7',

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27, py34, py35, py36, py37, py38, py39
+envlist = py27, py35, py36, py37, py38, py39
 
 [testenv]
 commands =