Use uv on GitHub Actions (#479)

Gives a nice speed boost.

.github/workflows/main.yml

@@ -32,13 +32,14 @@ jobs:
  with:
  python-version: ${{ matrix.python-version }}
  allow-prereleases: true
- cache: pip
- cache-dependency-path: 'requirements/*.txt'
+
+ - name: Install uv
+ uses: astral-sh/setup-uv@v1
+ with:
+ enable-cache: true
 
  - name: Install dependencies
- run: |
- python -m pip install --upgrade pip setuptools wheel
- python -m pip install --upgrade 'tox>=4.0.0rc3'
+ run: uv pip install --system tox tox-uv
 
  - name: Run tox targets for ${{ matrix.python-version }}
  run: tox run -f py$(echo ${{ matrix.python-version }} | tr -d .)
@@ -62,8 +63,11 @@ jobs:
  with:
  python-version: '3.12'
 
+ - name: Install uv
+ uses: astral-sh/setup-uv@v1
+
  - name: Install dependencies
- run: python -m pip install --upgrade coverage[toml]
+ run: uv pip install --system coverage[toml]
 
  - name: Download data
  uses: actions/download-artifact@v4