Helper: Define as final static class.

Author: janbarasek

src/Helper.php

@@ -5,11 +5,19 @@
 namespace Baraja\GitLabApi;
 
 
-class Helper
+final class Helper
 {
 
 	private const FORCE_ARRAY = 0b0001;
 
+	/**
+	 * @throws \Error
+	 */
+	final public function __construct()
+	{
+		throw new \Error('Class ' . get_class($this) . ' is static and cannot be instantiated.');
+	}
+
 	/**
 	 * Migrated from Nette/Tracy.
 	 *
@@ -73,4 +81,4 @@ public static function getLastErrorMessage(): ?string
 		return $return;
 	}
 
-}
+}