Update to eslint v9 #1390

	name: Frontend

	on:
	push:
	branches:
	- main
	paths:
	- translate/**
	- .github/workflows/frontend.yml
	pull_request:
	branches:
	- main
	paths:
	- translate/**
	- .github/workflows/frontend.yml
	workflow_dispatch:

	jobs:
	typescript:
	name: TypeScript
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-node@v4
	with: { node-version: '18' }
	- name: Install dependencies
	run: npm ci
	- name: Check TypeScript
	run: npm run types -- --pretty
	working-directory: translate
	- name: build
	run: npm run build
	working-directory: translate

	licenses:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-node@v4
	with: { node-version: '18' }
	- name: Install globals
	run: npm install --global license-checker-rseidelsohn@4.4.2
	- name: Install dependencies
	run: npm ci
	- name: Check licenses
	run: \|
	# --failOn doesn't print the licenses on failure.
	# Use jq to print only minimal info, then print a summary when
	# checking for GPL packages.
	license-checker-rseidelsohn --json \| jq -r 'to_entries[] \| "\(.key): \(.value.licenses)"'
	license-checker-rseidelsohn --summary --failOn 'GPL'

	jest:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-node@v4
	with: { node-version: '18' }
	- name: Install globals
	run: npm install --global npm@8
	- name: Install dependencies
	run: npm ci
	- name: Test
	run: npm test --coverage
	working-directory: translate
	- uses: codecov/codecov-action@v4
	with:
	flags: frontend
	env:
	CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

Provide feedback