Add missing isTextDirection method to Validator interface

Author: dingo-d

src/Validation/TypeValidator.php

@@ -168,6 +168,11 @@ public function isTextTransform(string $transform): bool
 		return isset($this->allowedTextTransform[$transform]);
 	}
 
+	public function isTextDirection(string $direction): bool
+	{
+		return in_array($direction, ['ltr', 'rtl'], true);
+	}
+
 	public function getValidator(string $validatorType)
 	{
 		$validatorClassName = __NAMESPACE__ . '\\Validators\\' . ucwords($validatorType) . 'Validator';

src/Validation/Validator.php

@@ -22,4 +22,5 @@ public function isString(string $string): bool;
 	public function isFontStyle(string $value): bool;
 	public function isTextDecoration(string $decoration): bool;
 	public function isTextTransform(string $transform): bool;
+	public function isTextDirection(string $direction): bool;
 }