Toolchain update travis drop py2x (#336)

* drop python 2 from supported languages

Python 2 compatibility will not be actively revoked, but will
not be worked on.

* update travis config

* remove flake8-test with Py2.7

.travis.yml

@@ -1,6 +1,7 @@
 language: python
 sudo: false
 cache: pip
+dist: xenial
 git:
   depth: 100000
 addons:
@@ -22,23 +23,26 @@ matrix:
       env: TOXENV=py36
     - python: 3.6-dev
       env: TOXENV=py36
+    - python: 3.7
+      env: TOXENV=py37
     - python: 3.7-dev
       env: TOXENV=py37
+    - python: 3.8-dev
+      env: TOXENV=py38
     - python: nightly
-      env: TOXENV=py37
+      env: TOXENV=py38
     - python: pypy
       env: TOXENV=pypy
     - python: pypy3
       env: TOXENV=pypy3
-    - python: 2.7
+    - python: 3.7
       env: TOXENV=docs
-    - python: 2.7
+    - python: 3.7
-      env: TOXENV=flake8
-    - python: 3.6
       env: TOXENV=flake8
   allow_failures:
     - python: 3.6-dev
     - python: 3.7-dev
+    - python: 3.8-dev
     - python: nightly
     - python: pypy3
 before_install:
@@ -63,4 +67,4 @@ deploy:
       tags: true
       repo: python-escpos/python-escpos
       branch: master
-      condition: $TRAVIS_PYTHON_VERSION = "3.6"
+      condition: $TRAVIS_PYTHON_VERSION = "3.7"

setup.py

@@ -65,8 +65,6 @@ setup(
         'License :: OSI Approved :: MIT License',
         'Operating System :: OS Independent',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27, py34, py35, docs, flake8
+envlist = py27, py34, py35, py36, py37, docs, flake8
 
 [testenv]
 deps = nose