Add admin notices new usage & .notice-alt examples #5

	name: PHP Composer

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

	jobs:
	build:

	runs-on: ubuntu-latest

	strategy:
	matrix:
	php-versions: [ '5.6','7.2', '7.3', '7.4', '8.0' ]

	steps:
	- uses: actions/checkout@v2

	- name: Setup PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php-versions }}

	- name: Check syntax error in sources
	run: find ./inc/ -type f -name '*.php' -print0 \| xargs -0 -L 1 -P 4 -- php -l

	- name: Clear cache of Composer
	run: composer clear-cache

	- name: Update Composer.json and composer.lock
	run: composer update

	- name: Cache Composer packages
	id: composer-cache
	uses: actions/cache@v2
	with:
	path: vendor
	key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
	restore-keys: \|
	${{ runner.os }}-php-

	- name: Install dependencies
	if: steps.composer-cache.outputs.cache-hit != 'true'
	run: composer install -q -n -a --no-progress --prefer-dist

	- name: Run phpCS Scripts from composer.json
	run: composer cs

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