Add keyboard markup tests and constructors to objects

src/TgBotLib/Objects/ReplyKeyboardRemove.php

@@ -10,6 +10,15 @@
         private bool $remove_keyboard;
         private bool $selective;
 
+        /**
+         * ReplyKeyboardRemove constructor.
+         */
+        public function __construct()
+        {
+            $this->remove_keyboard = false;
+            $this->selective = false;
+        }
+
         /**
          * Requests clients to remove the custom keyboard (user will not be able to summon this keyboard; if you want
          * to hide the keyboard from sight but keep it accessible, use one_time_keyboard in ReplyKeyboardMarkup)