Major cleanup

Changes done:
- python3 compatible
- black autoformat
- isort import order
- pipenv for dependency management
- migrate from deprecated travis-ci.org to circleci

.circleci/config.yml

@@ -0,0 +1,74 @@
+version: 2
+references:
+  restore_caches: &restore_caches
+    restore_cache:
+      keys:
+        - source-{{ .Branch }}
+        - deps-{{ .Branch }}-{{ checksum "Pipfile.lock" }}
+  install_deps: &install_deps
+    run:
+      name: Install dependencies
+      command: |
+        pipenv install --dev --ignore-pipfile --deploy
+
+jobs:
+  build:
+    docker:
+      - image: circleci/python:3.7.2
+
+    steps:
+      - checkout
+      - *restore_caches
+      - *install_deps
+      - save_cache:
+          key: source-{{ .Branch }}
+          paths:
+            - ".git"
+      - save_cache:
+          key: deps-{{ .Branch }}-{{ checksum "Pipfile.lock" }}
+          paths:
+            - "/home/circleci/.local/share/virtualenvs/"
+  lint:
+    docker:
+      - image: circleci/python:3.7.2
+
+    steps:
+      - checkout
+      - *restore_caches
+      - *install_deps
+      - run:
+          name: Black autoformat check
+          command: |
+            pipenv run black --check .
+      - run:
+          name: Isort import order check
+          command: |
+            pipenv run isort -c
+  test:
+    docker:
+      - image: circleci/python:3.7.2
+
+    steps:
+      - checkout
+      - *restore_caches
+      - *install_deps
+      - run:
+          name: Unit tests
+          command: |
+            pipenv run py.test
+      - run:
+          name: Coverage upload
+          command: |
+            pipenv run coveralls
+
+workflows:
+  version: 2
+  build_test:
+    jobs:
+      - build
+      - lint:
+          requires:
+            - build
+      - test:
+          requires:
+            - build

.coveragerc

@@ -0,0 +1,5 @@
+[run]
+branch = True
+
+[report]
+fail_under = 100

.flake8

@@ -0,0 +1,4 @@
+[flake8]
+max-line-length = 88
+select = C,E,F,W,B,B950
+ignore = E501,E203

.isort.cfg

@@ -0,0 +1,6 @@
+[settings]
+multi_line_output=3
+include_trailing_comma=True
+force_grid_wrap=0
+combine_as_imports=True
+line_length=88

LICENSE.txt

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2017 Martijn Hemeryck
+Copyright (c) 2019 Martijn Hemeryck
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

Pipfile

@@ -0,0 +1,18 @@
+[[source]]
+name = "pypi"
+url = "https://pypi.org/simple"
+verify_ssl = true
+
+[dev-packages]
+pytest = "*"
+black = "==18.9b0"
+pytest-cov = "*"
+isort = "*"
+coveralls = "*"
+
+[packages]
+factory-boy = "*"
+pytest-socket = "*"
+
+[requires]
+python_version = "3.7"