Drop support for Python 2.7

See: [Maintenance releases - PEP 373 -- Python 2.7 Release Schedule | Python.org](https://www.python.org/dev/peps/pep-0373/#maintenance-releases)

.travis.yml

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

README.rst

@@ -234,17 +234,6 @@ RAM: DDR3 1600Mhz 16GB
 
 Platform: Ubuntu 16.04 amd64
 
-Python 2.7.13
-^^^^^^^^^^^^^
-
-+-----------------+------------------+
-|                 | Request (call/s) |
-+=================+==================+
-| chardet v3.0.2  |       0.36       |
-+-----------------+------------------+
-| cchardet v2.0.1 |     1396.42      |
-+-----------------+------------------+
-
 Python 3.6.1
 ^^^^^^^^^^^^
 

appveyor.yml

@@ -1,11 +1,9 @@
 environment:
   matrix:
-    - PYTHON: "C:\\Python27"
     - PYTHON: "C:\\Python35"
     - PYTHON: "C:\\Python36"
     - PYTHON: "C:\\Python37"
     - PYTHON: "C:\\Python38"
-    - PYTHON: "C:\\Python27-x64"
     - 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-cp38 cp37-cp37m cp36-cp36m cp35-cp35m cp27-cp27m cp27-cp27mu; do
+for V in cp38-cp38 cp37-cp37m cp36-cp36m cp35-cp35m; 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

setup.py

@@ -27,7 +27,7 @@ if have_cython:
     pyx_sources = glob.glob(cchardet_dir + '*.pyx')
     sys.stderr.write('cythonize: %r\n' % (pyx_sources,))
     cython_compiler.compile(
-        pyx_sources, options=cython_compiler.CompilationOptions(cplus=True))
+        pyx_sources, options=cython_compiler.CompilationOptions(cplus=True, compiler_directives={"language_level": 3}))
 
 cchardet_sources = glob.glob(cchardet_dir + '*.cpp')
 sources = cchardet_sources
@@ -128,8 +128,6 @@ setup(
         'Programming Language :: Cython',
         'Programming Language :: Python',
         'Topic :: Software Development :: Libraries',
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',

tox.ini

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