barcodes: replace viivakoodi with python-barcode

python-barcode is yet another clone of the PyPI barcode library, but
which is still developped compared to viivakoodi.

The author provides Python 3.7 support in the last release, which is a
nice to have.  However, since this dependency requires at least Python
3.5, we have to align our minimum supported version to 3.5 too, and drop
near EOL Python 2.7 support.

Signed-off-by: Romain Porte <microjoe@microjoe.org>

.travis.yml

@@ -29,8 +29,6 @@ matrix:
       osx_image: xcode10.2
       language: shell
       env: TOXENV=py37 ESCPOS_CAPABILITIES_FILE=/Users/travis/build/python-escpos/python-escpos/capabilities-data/dist/capabilities.json
-    - python: 3.4
-      env: TOXENV=py34
     - python: 3.5
       env: TOXENV=py35
     - python: 3.6

README.rst

@@ -47,7 +47,7 @@ This library makes use of:
 * `Pillow <https://github.com/python-pillow/Pillow>`_ for image printing
 * `qrcode <https://github.com/lincolnloop/python-qrcode>`_ for the generation of QR-codes
 * `pyserial <https://github.com/pyserial/pyserial>`_ for serial printers
-* `viivakoodi <https://github.com/kxepal/viivakoodi>`_ for the generation of barcodes
+* `python-barcode <https://github.com/WhyNotHugo/python-barcode>`_ for the generation of barcodes
 
 Documentation and Usage
 -----------------------

doc/requirements.txt

@@ -5,4 +5,4 @@ pyserial
 sphinx-rtd-theme
 setuptools-scm
 docutils>=0.12
-viivakoodi
+python-barcode>=0.11.0,<1

setup.py

@@ -62,7 +62,6 @@ setup(
         'Operating System :: OS Independent',
         'Programming Language :: Python',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
@@ -82,7 +81,7 @@ setup(
         'argparse',
         'argcomplete',
         'future',
-        'viivakoodi>=0.8'
+        'python-barcode>=0.9.1,<1'
     ],
     setup_requires=[
         'setuptools_scm',

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py34, py35, py36, py37, docs, flake8
+envlist = py35, py36, py37, docs, flake8
 
 [testenv]
 deps = nose
@@ -11,7 +11,7 @@ deps = nose
        pytest-cov
        pytest-mock
        hypothesis!=3.56.9,<4
-       viivakoodi
+       python-barcode
 commands = py.test --cov escpos
 passenv = ESCPOS_CAPABILITIES_PICKLE_DIR ESCPOS_CAPABILITIES_FILE CI TRAVIS TRAVIS_* APPVEYOR APPVEYOR_* CODECOV_*
 
@@ -20,7 +20,7 @@ basepython = python
 changedir = doc
 deps = sphinx>=1.5.1
        setuptools_scm
-       viivakoodi
+       python-barcode
 commands = sphinx-build -W -b html -d {envtmpdir}/doctrees .  {envtmpdir}/html
 
 [testenv:flake8]