Added Linux to DeviceOS list (#339)

Author: xRookieFight

src/types/DeviceOS.php

@@ -31,5 +31,5 @@ final class DeviceOS{
 	public const NINTENDO = 12;
 	public const XBOX = 13;
 	public const WINDOWS_PHONE = 14;
-
+	public const LINUX = 15;
 }