Fix return type of ReflectionEnum::getBackingType for PHP 8.2 #3681

	name: Check backward compatibility

	on: pull_request
	jobs:
	bcc:
	name: Check backward compatibility
	runs-on: ubuntu-latest
	steps:
	- name: Set up PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: '8.1'
	tools: composer:v2
	coverage: none
	env:
	fail-fast: true

	- uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Get Composer Cache Directories
	id: composer-cache
	run: \|
	echo "files_cache=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
	echo "vcs_cache=$(composer config cache-vcs-dir)" >> $GITHUB_OUTPUT

	- name: Generate composer.lock
	run: \|
	composer update --no-install

	- name: Cache composer cache
	uses: actions/cache@v4
	with:
	path: \|
	${{ steps.composer-cache.outputs.files_cache }}
	${{ steps.composer-cache.outputs.vcs_cache }}
	key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
	restore-keys: \|
	${{ runner.os }}-composer-

	- name: Run composer install
	run: \|
	composer install -o
	composer bin bcc install
	env:
	COMPOSER_ROOT_VERSION: dev-master

	- name: Run BCC
	run: vendor/bin/roave-backward-compatibility-check --from="origin/$GITHUB_BASE_REF" --format=github-actions
	env:
	COMPOSER_ROOT_VERSION: dev-master

Provide feedback