Add PSR12 ruleset checking to phpcsfixer but overwrite 'visibility_required' setting since we still support PHP 7.0 for now.

Author: hostep

.php_cs

@@ -8,6 +8,7 @@ $finder = PhpCsFixer\Finder::create()
 return PhpCsFixer\Config::create()
     ->setRules([
         '@Symfony'               => true,
+        '@PSR12'                 => true,
         'array_syntax'           => ['syntax' => 'short'],
         'binary_operator_spaces' => ['default' => null, 'operators' => ['=>' => 'align']],
         'concat_space'           => ['spacing' => 'one'],
@@ -26,6 +27,7 @@ return PhpCsFixer\Config::create()
         'phpdoc_summary'         => false,
         'self_accessor'          => true,
         'single_line_throw'      => false,
+        'visibility_required'    => ['property', 'method'], // removed 'const' since we still support PHP 7.0 for now
         'yoda_style'             => null,
     ])
     ->setFinder($finder)