Replace Travis with GitHub actions and use Poetry.

The Python ecosystem has moved on a bit since I last touched this
project. It no longer makes sense to support Python 2 and type hints are
becoming more common. This is the first commit towards that.

.github/workflows/ci.yml

@@ -0,0 +1,32 @@
+name: CI
+
+on:
+  # This avoids having duplicate builds for a pull request
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  tests:
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.7", "3.8", "3.9", "3.10"]
+        os: ["ubuntu-latest"]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Run image
+        uses: abatilo/actions-poetry@v2.0.0
+        with:
+          poetry-version: 1.1.13
+      - name: Install dev dependencies
+        run: poetry install
+      - name: Run pytest
+        run: poetry run pytest

README.rst

@@ -100,21 +100,6 @@ Pull requests are credited in the change log which is displayed on PyPI and the
 documentaion on Read the Docs.
 
 
-.. |test-status| image:: https://travis-ci.org/runfalk/spans.svg
-    :alt: Test status
-    :scale: 100%
-    :target: https://travis-ci.org/runfalk/spans
-
-.. |test-coverage| image:: https://codecov.io/github/runfalk/spans/coverage.svg?branch=master
-    :alt: Test coverage
-    :scale: 100%
-    :target: https://codecov.io/github/runfalk/spans?branch=master
-
-.. |documentation-status| image:: https://readthedocs.org/projects/spans/badge/
-    :alt: Documentation status
-    :scale: 100%
-    :target: http://spans.readthedocs.org/en/latest/
-
 .. |pypi-version| image:: https://badge.fury.io/py/Spans.svg
     :alt: PyPI version status
     :scale: 100%

pyproject.toml

@@ -0,0 +1,36 @@
+[tool.poetry]
+name = "spans"
+version = "2.0.0"
+description = "Continuous set support for Python"
+authors = ["Andreas Runfalk <andreas@runfalk.se>"]
+license = "MIT"
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Programming Language :: Python :: Implementation :: PyPy",
+    "Topic :: Utilities"
+]
+
+[tool.poetry.dependencies]
+python = "^3.7"
+
+[tool.poetry.dev-dependencies]
+pytest = "^7.1.2"
+
+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"
+
+[tool.pytest.ini_options]
+addopts = "--doctest-glob='*.rst' --doctest-modules"
+doctest_optionflags = "ALLOW_UNICODE ALLOW_BYTES"
+norecursedirs = "_build"
+testpaths = "spans tests doc README.rst"