Bump gh actions (checkout) #24

	name: ci
	on:
	pull_request:
	push:
	branches:
	- main
	jobs:
	test:
	name: test
	env:
	# Emit backtraces on panics.
	RUST_BACKTRACE: 1
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os:
	- ubuntu-latest
	- macos-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Build project (debug mode)
	shell: bash
	run: cargo build

	- name: Run tests
	shell: bash
	run: cargo test

	rustfmt:
	name: rustfmt
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	- name: Check formatting
	run: \|
	cargo fmt --all -- --check

	docs:
	name: Docs
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	- name: Check documentation
	# env:
	# RUSTDOCFLAGS: -D warnings
	run: \|
	cargo doc --no-deps

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