Bump actions/checkout from 3 to 4 #267

	name: CI checks

	on: [push, pull_request]

	jobs:
	test:
	name: Test on ${{ matrix.os }}
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest, windows-latest, macOS-latest]

	steps:
	- uses: actions/checkout@v4
	- name: Run tests
	run: cargo test --verbose --release --features experimental,zeroize

	no-std:
	name: Check no-std target ${{ matrix.target }}
	runs-on: ubuntu-latest
	strategy:
	matrix:
	target:
	- thumbv6m-none-eabi
	- wasm32-unknown-unknown
	- wasm32-wasi

	steps:
	- uses: actions/checkout@v4
	- run: rustup target add ${{ matrix.target }}
	- run: cargo fetch
	- name: Build
	run: >
	cargo build
	--verbose
	--target ${{ matrix.target }}
	--no-default-features
	--features groups,pairings

	bitrot:
	name: Bitrot check
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	# Build benchmarks and all-features to prevent bitrot
	- name: Build benchmarks
	run: cargo build --benches --examples --all-features

	doc-links:
	name: Intra-doc links
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- run: cargo fetch
	# Requires #![deny(rustdoc::broken_intra_doc_links)] in crate.
	- name: Check intra-doc links
	run: cargo doc --document-private-items

	fmt:
	name: Rustfmt
	timeout-minutes: 30
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Check formatting
	run: cargo fmt --all -- --check

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