gh-342: install libbz2-dev and use setup-python (#343)

All of a sudden `libbz2-dev` is not present by default in GH Actions now
+ we were using system Python for a couple of jobs.

Closes: #342

.github/workflows/test.yml

@@ -45,6 +45,10 @@ jobs:
  python-version: ${{ matrix.python-version }}
  - name: Install nox and coverage.py
  run: pip install coverage[toml] nox
+ - name: Install ubuntu dependencies for fitsio
+ run: |
+ sudo apt-get update
+ sudo apt-get install libbz2-dev
  - name: Run doctests
  run: nox -s doctests-${{ matrix.python-version }} --verbose
  - name: Run tests and generate coverage report
@@ -76,6 +80,9 @@ jobs:
  - uses: actions/checkout@v4
  with:
  fetch-depth: 0
+ - uses: actions/setup-python@v5
+ with:
+ python-version: 3.x
  - name: Install nox
  run: pip install nox
  - name: Build SDist and wheel
@@ -89,6 +96,9 @@ jobs:
  - uses: actions/checkout@v4
  with:
  fetch-depth: 0
+ - uses: actions/setup-python@v5
+ with:
+ python-version: 3.x
  - name: Install dependencies
  run: |
  sudo apt-get update