add eslint@9 support and flat config #481

	name: Build and test

	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]
	workflow_dispatch: {}

	jobs:
	build:
	name: Build and test
	runs-on: ubuntu-latest
	steps:
	- name: Checkout Repo
	uses: actions/checkout@master

	- name: Setup Node.js 22.x
	uses: actions/setup-node@master
	with:
	node-version: 22.x

	- name: Install Dependencies
	run: yarn --frozen-lockfile --ignore-scripts

	- name: Lint
	run: yarn lint

	- name: Build check
	run: yarn lerna run build:check

	- name: Build packages
	run: yarn lerna run build:test

	- name: Test
	run: yarn test -i

	- name: Test size
	run: yarn lerna run test:size

	- name: Test flow
	run: yarn mobx test:flow

	- name: Test performance
	run: yarn mobx test:performance

Provide feedback