Update friendsofphp/php-cs-fixer requirement from ^3.86 to ^3.87 #276

Job	Run time
phpunit (ubuntu-latest, 8.2, tests-e2e/bug52/, vendor/bin/phpstan analyse )	19s
phpunit (ubuntu-latest, 8.2, tests-e2e/youtrack/, diff -w <(vendor/bin/phpstan analyse --error-fo...	15s
phpunit (ubuntu-latest, 8.2, tests-e2e/github/, diff -w <(vendor/bin/phpstan analyse --error-form...	15s
phpunit (ubuntu-latest, 8.2, tests-e2e/jira/, diff -w <(vendor/bin/phpstan analyse --error-format...	12s
	1m 1s

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