Modernize packaging, testing, etc.

Author: Exirel

.github/workflows/ci.yaml

@@ -0,0 +1,45 @@
+---
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  tests:
+    name: Test suite
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version:
+          - "3.8"
+          - "3.9"
+          - "3.10"
+          - "3.11"
+          - "3.12"
+        lxml-range:
+          - "lxml>=4.0.0,<5.0"
+          - "lxml>=5.0.0"
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }} for ${{ matrix.lxml-range }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install --upgrade wheel
+          python -m pip install --upgrade -r requirements.txt
+          python -m pip install --upgrade "${{ matrix.lxml-range }}"
+          python -m pip install -e .
+      - name: Lint
+        run: |
+          isort -c xmlunittest.py
+          flake8 xmlunittest.py
+      - name: Test
+        run: pytest test.py

.travis.yml

@@ -1,4 +1,4 @@
-include README.md
+include README.rst
 include LICENSE
 include doc/Makefile
 include doc/index.rst