[CI] PHP CS Fixer it up (#18)

Author: bocharsky-bw

src/DependentField.php

@@ -20,7 +20,7 @@ class DependentField
     private array $options = [];
     private bool $shouldBeAdded = false;
 
-    public function add(string $type = null, array $options = []): static
+    public function add(?string $type = null, array $options = []): static
     {
         $this->type = $type;
         $this->options = $options;

src/DynamicFormBuilder.php

@@ -152,7 +152,7 @@ private function executeReadyCallbacks(array $availableDependencyData, string $e
         }
     }
 
-    private function initializeListeners(array $fieldsToConsider = null): void
+    private function initializeListeners(?array $fieldsToConsider = null): void
     {
         $registeredFields = [];
         foreach ($this->dependentFieldConfigs as $dynamicField) {
@@ -194,14 +194,14 @@ public function count(): int
     /**
      * @param string|FormBuilderInterface $child
      */
-    public function add($child, string $type = null, array $options = []): static
+    public function add($child, ?string $type = null, array $options = []): static
     {
         $this->builder->add($child, $type, $options);
 
         return $this;
     }
 
-    public function create(string $name, string $type = null, array $options = []): FormBuilderInterface
+    public function create(string $name, ?string $type = null, array $options = []): FormBuilderInterface
     {
         return $this->builder->create($name, $type, $options);
     }
@@ -289,7 +289,7 @@ public function setAttributes(array $attributes): static
         return $this;
     }
 
-    public function setDataMapper(DataMapperInterface $dataMapper = null): static
+    public function setDataMapper(?DataMapperInterface $dataMapper = null): static
     {
         $this->builder->setDataMapper($dataMapper);