Migrate to Clap v4, bump MSRV to 1.75 #919

	on:
	push:
	branches:
	- main
	pull_request:
	schedule:
	- cron: '30 3 * * 2'

	name: CI

	jobs:
	test:
	name: run tests
	strategy:
	matrix:
	platform: [ubuntu-latest, macos-latest, windows-latest]
	toolchain: [stable, 1.64.0]
	runs-on: ${{ matrix.platform }}
	steps:
	- uses: actions/checkout@v4
	- uses: dtolnay/rust-toolchain@master
	with:
	toolchain: ${{ matrix.toolchain }}
	- name: Build with default features
	run: cargo build
	- name: Build with logging and webpki roots
	run: cargo build --features logging,webpki-roots --no-default-features
	- name: Run tests
	run: cargo test

	clippy:
	name: run clippy lints
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: dtolnay/rust-toolchain@master
	with:
	toolchain: stable
	components: clippy
	- name: run clippy lints
	run: cargo clippy --features logging

	fmt:
	name: run rustfmt
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: dtolnay/rust-toolchain@master
	with:
	toolchain: stable
	components: rustfmt
	- name: run rustfmt
	run: cargo fmt --all -- --check

	docs:
	name: build docs
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Setup mdBook
	uses: peaceiris/actions-mdbook@v2
	with:
	mdbook-version: '0.4.4'
	- name: Setup toolchain
	uses: dtolnay/rust-toolchain@master
	with:
	toolchain: stable
	- name: Build
	run: cargo build
	- name: Ensure that docs can be built
	run: cd docs && mdbook build
	- name: Generate usage string
	run: cargo run -- --help > docs/src/usage-actual.txt
	- name: Ensure that usage string is up to date
	run: diff docs/src/usage{,-actual}.txt

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