Add multiple python versions to CI

.travis.yml

@@ -2,13 +2,26 @@
 language: python
 sudo: required
 dist: xenial
-python: "3.7"
+python:
+  - "3.6"
+  - "3.7"
 cache: pip
 install:
-  - pip install -r requirements-dev.txt
-script:
-  - make safety
-  - make lint
   - pip install .
-  - make unittests
-after_success: coveralls
+  - pip install -r requirements-dev.txt
+jobs:
+  include:
+    - stage: "Linters"
+      script: make lint
+      python: "3.7"
+    - stage: "Safety check"
+      script: make safety
+      python: "3.7"
+    - stage: "Tests"
+      script: make unittests
+      after_success: coveralls
+      python: "3.7"
+stages:
+  - "Linters"
+  - "Safety check"
+  - "Tests"

Makefile

@@ -3,7 +3,7 @@ coverage_html:  ## create html coverage report and open it in the default browse
 	xdg-open htmlcov/index.html
 
 flake8:  ## run flake8
-	flake8 flake8_koles/
+	flake8 flake8_koles/ --ignore=KOL001,KOL002
 
 lint: mypy flake8 yamllint  # run all linters
 

README.md

@@ -2,8 +2,10 @@
 
 [![Build Status](https://travis-ci.org/myslak71/flake8-koles.svg?branch=master)](https://travis-ci.org/myslak71/flake8-koles)
 [![Coverage Status](https://coveralls.io/repos/github/myslak71/flake8-koles/badge.svg?branch=master)](https://coveralls.io/github/myslak71/flake8-koles?branch=master)
-![image](https://img.shields.io/badge/python-3.7-blue.svg)
+![PyPI - Python Version](https://img.shields.io/pypi/pyversions/flake8-koles)
 ![image](https://img.shields.io/badge/version-0.1.2-yellow)
+![Requires.io](https://img.shields.io/requires/github/myslak71/flake8-koles)
+![GitHub](https://img.shields.io/github/license/myslak71/flake8-koles)
 
 Watch your language young pal!
 

requirements-dev.txt

@@ -4,14 +4,14 @@ flake8==3.7.8
 flake8-docstrings==1.3.1
 flake8-print==3.1.0
 flake8-isort==2.7.0
-mypy==0.711
+mypy==0.720
 yamllint==1.16.0
 
 # Testing purposes
 ########################
 pytest==5.0.1
 pytest-cov==2.7.1
-coveralls==1.8.1
+coveralls==1.8.2
 
 # Debugging
 ########################

setup.py

@@ -31,7 +31,7 @@
     packages=['flake8_koles'],
     package_data={'flake8_koles': ['data/swear_list/*.dat']},
     py_modules=['flake8_koles'],
-    python_requires=">=3.7",
+    python_requires=">=3.6",
     install_requires=install_requires,
     entry_points={
         'flake8.extension': [