chore: fix nullable param deprecation (#110)

Author: deviantintegral

.php-cs-fixer.dist.php

@@ -8,7 +8,7 @@
         '@Symfony:risky' => true,
         'protected_to_private' => false,
         'native_constant_invocation' => ['strict' => false],
-        'nullable_type_declaration_for_default_null_value' => ['use_nullable_type_declaration' => false],
+        'nullable_type_declaration_for_default_null_value' => true,
         'modernize_strpos' => true,
     ])
     ->setRiskyAllowed(true)

src/SharedFields/TextTrait.php

@@ -18,7 +18,7 @@ trait TextTrait
      */
     protected $text;
 
-    public function setText(string $text = null): self
+    public function setText(?string $text = null): self
     {
         $this->text = $text;