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 +1,73 @@
+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: ${{ matrix.os }}
+    name: Pytest (${{ matrix.python-version }}, ${{ matrix.os }})
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Install Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install Poetry
+        uses: abatilo/actions-poetry@v2.0.0
+        with:
+          poetry-version: 1.1.13
+      # Remove the lock file unless we're using the stable version of Python.
+      # This is required because older Python version require "polyfills" for
+      # some libraries
+      - name: Remove poetry.lock file
+        run: rm poetry.lock
+        if: ${{ matrix.python-version != '3.10' }}
+      - name: Install dev dependencies
+        run: poetry install
+      - name: Run pytest
+        run: poetry run pytest
+
+  docs:
+    runs-on: ubuntu-latest
+    name: Documentation
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Install Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.10
+      - name: Install Poetry
+        uses: abatilo/actions-poetry@v2.0.0
+        with:
+          poetry-version: 1.1.13
+      - name: Install dev dependencies
+        run: poetry install
+      - name: Build documentation
+        run: |
+          poetry run sphinx-build -b html doc doc-build
+          touch doc-build/.nojekyll
+      - name: Deploy
+        uses: crazy-max/ghaction-github-pages@v3
+        if: github.ref == 'refs/heads/master'
+        with:
+          allow_empty_commit: false
+          build_dir: doc-build/
+          committer_name: Andreas Runfalk
+          committer_email: andreas@runfalk.se
+          keep_history: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

README.rst

@@ -1,6 +1,6 @@
 Spans
 =====
-|test-status| |test-coverage| |documentation-status| |pypi-version| |py-versions| |license|
+|pypi-version| |py-versions| |license|
 
 Spans is a pure Python implementation of PostgreSQL's
 `range types <http://www.postgresql.org/docs/9.6/static/rangetypes.html>`_.
@@ -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%