Use GitHub Actions as the CI

Move away from Semaphore and use GitHub Actions as our CI for this
project.

Semaphore doesn't have Python 12 yet for us to test against, it will
update versions once a month, and with GitHub Actions we can run it on
the CI today.

[skip changeset]

.github/workflows/ci.yml

@@ -0,0 +1,54 @@
+name: Python package
+on: [push]
+jobs:
+  test:
+    name: "Test Python ${{ matrix.python-version }}"
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: "Install hatch"
+        run: "pip install hatch"
+      - name: "Run tests"
+        run: "hatch -v run test.py$(echo ${{ matrix.python-version }} | tr -d '.'):pytest"
+
+  lint-style:
+    name: "Style linter"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: 3.12
+      - name: "Install hatch"
+        run: "pip install hatch"
+      - name: "Run style linter"
+        run: "hatch -v run lint:style"
+
+  lint-typing:
+    name: "Typing linter"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: 3.12
+      - name: "Install hatch"
+        run: "pip install hatch"
+      - name: "Run typing linter"
+        run: "hatch -v run lint:typing"
+
+  lint-git:
+    name: "Git linter (Lintje)"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # Fetch depth is required
+      - uses: lintje/[email protected]

pyproject.toml

@@ -20,6 +20,7 @@ classifiers = [
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: Implementation :: CPython",
   "Programming Language :: Python :: Implementation :: PyPy",
   # Application version
@@ -72,7 +73,7 @@ dependencies = [
 ]
 
 [[tool.hatch.envs.test.matrix]]
-python = ["38", "39", "310", "311"]
+python = ["38", "39", "310", "311", "312"]
 
 [tool.hatch.envs.lint]
 detached = true