remove travis config

fixes #389

.travis.yml

@@ -1,79 +0,0 @@
-language: python
-sudo: false
-cache: pip
-dist: bionic
-git:
-  depth: 100000
-addons:
-  apt:
-    packages:
-      - graphviz
-      - libenchant1c2a
-matrix:
-  fast_finish: true
-  include:
-    - name: "Python 3.7 on Windows"
-      os: windows
-      language: shell
-      before_install:
-         - choco install python
-         - pip install tox codecov 'sphinx>=1.5.1' 'sphinxcontrib-spelling>=5'
-      env:
-         - TOXENV=py37
-         - PATH=/c/Python37:/c/Python37/Scripts:$PATH
-         - ESCPOS_CAPABILITIES_FILE=C:/Users/travis/build/python-escpos/python-escpos/capabilities-data/dist/capabilities.json
-    - name: "Python 3.7 on macOS"
-      os: osx
-      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: 3.5
-      env: TOXENV=py35
-    - python: 3.6
-      env: TOXENV=py36
-    - python: 3.7
-      env: TOXENV=py37
-    - python: 3.7-dev
-      env: TOXENV=py37
-    - python: 3.8
-      env: TOXENV=py38
-    - python: 3.8-dev
-      env: TOXENV=py38
-    - python: nightly
-      env: TOXENV=py38
-    - python: pypy3
-      env: TOXENV=pypy3
-    - python: 3.8
-      env: TOXENV=docs
-    - python: 3.8
-      env: TOXENV=flake8
-  allow_failures:
-    - python: 3.7-dev
-    - python: 3.8-dev
-    - python: nightly
-    - python: pypy3
-    - os: windows
-    - os: osx
-before_install:
-    - pip install tox codecov 'sphinx>=1.5.1' 'sphinxcontrib-spelling>=5'
-    - ./doc/generate_authors.sh --check
-script:
-    - tox
-    - codecov
-notifications:
-  email:
-    on_success: never
-    on_failure: change
-deploy:
-# Github deployment
-  - provider: releases
-    api_key:
-      secure: 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
-    file: .tox/dist/python-escpos*.zip
-    file_glob: true
-    skip_cleanup: true
-    on:
-      tags: true
-      repo: python-escpos/python-escpos
-      branch: master
-      condition: $TRAVIS_PYTHON_VERSION = "3.8"