Migrate to GitHub actions (#33)

This PR migrates our CI/CD from Travis to Github Actions.

Instead of one deployment, I split into three workflows:
- Run the test suite on every push, in every branch
- Deploy to pypi when the default branch (master in our case) receives a new commit and has a diepvries/* tag
- Build and deploy docs to Github Pages when the default branch receives a new commit and has a diepvries/* tag

To enable this, I changed the following repository settings:
- Added TWINE_PASSWORD to the repository secrets.
- Changed Github Pages deployment source from the gh-pages branch to Github Actions.

.github/workflows/pages-build-and-deploy.yml

@@ -0,0 +1,45 @@
+name: pages-build-and-deploy
+
+# Only run this workflow when a diepvries/* tag gets pushed
+on:
+  push:
+    tags:
+      - diepvries/*
+
+jobs:
+  deploy-github-pages:
+    runs-on: ubuntu-22.04
+
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    permissions:
+      pages: write # to deploy to Pages
+      id-token: write # to verify the deployment originates from an appropriate source
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Setup Python
+        uses: actions/setup-python@v4.2.0
+        with:
+          python-version: 3.9
+      - name: Install dependencies
+        run: |
+          sudo apt update
+          sudo apt install -y graphviz
+          python -m pip install tox
+      - name: Run tox
+        run: python -m tox -e doc
+      - name: Configure Pages
+        uses: actions/configure-pages@v1.1.0
+      - name: Upload GitHub Pages artifact
+        uses: actions/upload-pages-artifact@v1.0.3
+        with:
+          path: doc/html
+      - name: Deploy GitHub Pages site
+        id: deployment
+        uses: actions/deploy-pages@v1.0.8

.github/workflows/pypi-build-and-deploy.yml

@@ -0,0 +1,29 @@
+name: pypi-build-and-deploy
+
+# Only run this workflow when a diepvries/* tag gets pushed
+on:
+  push:
+    tags:
+      - diepvries/*
+
+jobs:
+  deploy-to-pypi:
+    runs-on: ubuntu-22.04
+
+    env:
+      TWINE_USERNAME: __token__
+      TWINE_PASSWORD: ${{ secrets.TWINE_PASSWORD }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Setup Python
+        uses: actions/setup-python@v4.2.0
+        with:
+          python-version: 3.9
+      - name: Install dependencies
+        run: python -m pip install tox
+      - name: Run tox
+        run: python -m tox -e build -e upload

.github/workflows/run-test-suite.yml

@@ -0,0 +1,22 @@
+name: run-test-suite
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        python-version: ["3.8", "3.9"]
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Setup Python
+        uses: actions/setup-python@v4.2.0
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: python -m pip install tox
+      - name: Run tests
+        run: python -m tox -e py -e lint

CHANGELOG.md

@@ -6,8 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 ### Added
-- Add `StagingTable` class.
+- Add `StagingTable` class (#30).
 - Add the pre-commit tool (#34).
+- Changed CI/CD from Travis to Github Actions (#33).
 
 ## [0.6.2] - 2021-08-20
 ### Added