Fixed chat and some TextContainer documentation issues

src/pocketmine/Player.php

@@ -3566,7 +3566,7 @@ class Player extends Human implements CommandSender, InventoryHolder, ChunkLoade
 	/**
 	 * Sends a direct chat message to a player
 	 *
-	 * @param string|TextContainer $message
+	 * @param TextContainer|string $message
 	 */
 	public function sendMessage($message){
 		if($message instanceof TextContainer){

src/pocketmine/Server.php

@@ -1660,7 +1660,7 @@ class Server{
 	 *
 	 * @return int
 	 */
-	public function broadcastMessage($message, array $recipients = []) : int{
+	public function broadcastMessage($message, array $recipients = null) : int{
 		if(!is_array($recipients)){
 			return $this->broadcast($message, self::BROADCAST_CHANNEL_USERS);
 		}
@@ -1755,12 +1755,12 @@ class Server{
 	}
 
 	/**
-	 * @param string $message
+	 * @param TextContainer|string $message
 	 * @param string               $permissions
 	 *
 	 * @return int
 	 */
-	public function broadcast(string $message, string $permissions) : int{
+	public function broadcast($message, string $permissions) : int{
 		/** @var CommandSender[] $recipients */
 		$recipients = [];
 		foreach(explode(";", $permissions) as $permission){

src/pocketmine/command/CommandSender.php

@@ -23,12 +23,13 @@ declare(strict_types=1);
 
 namespace pocketmine\command;
 
+use pocketmine\event\TextContainer;
 use pocketmine\permission\Permissible;
 
 interface CommandSender extends Permissible{
 
 	/**
-	 * @param string $message
+	 * @param TextContainer|string $message
 	 */
 	public function sendMessage($message);
 

src/pocketmine/command/ConsoleCommandSender.php

@@ -102,7 +102,7 @@ class ConsoleCommandSender implements CommandSender{
 	}
 
 	/**
-	 * @param string $message
+	 * @param TextContainer|string $message
 	 */
 	public function sendMessage($message){
 		if($message instanceof TextContainer){

src/pocketmine/event/player/PlayerDeathEvent.php

@@ -67,7 +67,7 @@ class PlayerDeathEvent extends EntityDeathEvent{
 	}
 
 	/**
-	 * @param string|TextContainer $deathMessage
+	 * @param TextContainer|string $deathMessage
 	 */
 	public function setDeathMessage($deathMessage){
 		$this->deathMessage = $deathMessage;