Prepare `-alpha.4` release #159

	on:
	push: # Run CI for all branches except GitHub merge queue tmp branches
	branches-ignore:
	- "gh-readonly-queue/**"
	pull_request: # Run CI for PRs on any branch
	merge_group: # Run CI for the GitHub merge queue

	name: Continuous integration

	jobs:
	ci-linux:
	name: CI
	runs-on: ubuntu-latest

	strategy:
	fail-fast: false
	matrix:
	rust: [stable]
	target: [x86_64-unknown-linux-gnu, armv7-unknown-linux-gnueabihf]
	features:
	- ''
	- 'async-tokio,gpio_cdev,gpio_sysfs,i2c,spi'

	include:
	- rust: 1.65.0 # MSRV
	target: x86_64-unknown-linux-gnu

	# Test nightly but don't fail
	- rust: nightly
	experimental: true
	target: x86_64-unknown-linux-gnu

	steps:
	- uses: actions/checkout@v4
	- uses: dtolnay/rust-toolchain@master
	with:
	toolchain: ${{ matrix.rust }}
	target: ${{ matrix.target }}

	- name: Install armv7 libraries
	if: ${{ matrix.target == 'armv7-unknown-linux-gnueabihf' }}
	run: \|
	sudo apt-get update
	sudo apt-get install -y libc6-armhf-cross libc6-dev-armhf-cross gcc-arm-linux-gnueabihf

	- run: cargo check --target=${{ matrix.target }} --features=${{ matrix.features }}

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