Update typescript-eslint monorepo to v8.21.0 #2437

	# https://docs.github.com/en/actions/using-jobs/using-a-matrix-for-your-jobs
	# https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
	# https://github.com/cypress-io/github-action

	name: CI

	on:
	push:
	branches:
	- master
	- update
	pull_request:
	branches: [master]

	env:
	# default changed in node 17
	# https://nodejs.org/dist/latest-v18.x/docs/api/cli.html#--dns-result-orderorder
	NODE_OPTIONS: --dns-result-order=ipv4first

	jobs:
	build:
	runs-on: ubuntu-latest

	strategy:
	matrix:
	node-version: [20.x, 21.x, 22.x, 23.x]
	# See supported Node.js release schedule at https://nodejs.org/en/about/releases/

	steps:
	- uses: actions/checkout@v4
	- name: Use Node.js ${{ matrix.node-version }}
	uses: actions/setup-node@v4
	with:
	node-version: ${{ matrix.node-version }}
	# cache: 'npm'
	- run: npm i -g npm@10
	- run: npm --version
	- run: npm ci
	- run: npm run build --if-present
	- run: npm test
	- run: npm run prettier:check
	- run: npm run lint

	# Install NPM dependencies, cache them correctly
	# and run all Cypress tests
	- name: Run E2E tests
	uses: cypress-io/github-action@v6
	with:
	browser: chrome
	spec: cypress/e2e/0-my-tests/**
	start: npm start
	wait-on: 'http://localhost:4200'

	- name: Run Component tests 🧪
	uses: cypress-io/github-action@v6
	with:
	browser: chrome
	# we have already installed everything
	install: false
	# to run component tests we need to use "component: true"
	component: true

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