fix: generation of plantuml's diagrams in book #123

	name: CI

	on:
	push:
	branches: ["*"]
	pull_request:
	branches: ["main"]
	merge_group:

	concurrency:
	group: ${{ github.ref }}
	cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}

	permissions:
	contents: read

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	rust:
	- "1.74"
	- stable
	- beta
	- nightly
	cargo-update:
	- true
	include:
	- rust: stable
	cargo-update: false
	steps:
	- uses: actions/checkout@v4
	- uses: dtolnay/rust-toolchain@master
	with:
	toolchain: ${{ matrix.rust }}
	- name: Update
	if: matrix.cargo-update
	run: cargo update
	- name: Run tests
	run: cargo test
	lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: dtolnay/rust-toolchain@master
	with:
	toolchain: stable
	components: rustfmt clippy
	- name: Run rustfmt check
	run: cargo fmt --all -- --check
	- name: Run clippy
	run: cargo clippy --all --all-targets -- -D warnings

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