Added typehints and PhpDoc for events API

excluded blocks and entities events API to avoid merge conflicts

src/pocketmine/event/level/ChunkEvent.php

@@ -46,7 +46,7 @@ abstract class ChunkEvent extends LevelEvent{
 	/**
 	 * @return Chunk
 	 */
-	public function getChunk(){
+	public function getChunk() : Chunk{
 		return $this->chunk;
 	}
 }

src/pocketmine/event/level/ChunkLoadEvent.php

@@ -33,6 +33,7 @@ use pocketmine\level\format\Chunk;
 class ChunkLoadEvent extends ChunkEvent{
 	public static $handlerList = null;
 
+	/** @var bool */
 	private $newChunk;
 
 	public function __construct(Level $level, Chunk $chunk, bool $newChunk){
@@ -43,7 +44,7 @@ class ChunkLoadEvent extends ChunkEvent{
 	/**
 	 * @return bool
 	 */
-	public function isNewChunk(){
+	public function isNewChunk() : bool{
 		return $this->newChunk;
 	}
 }

src/pocketmine/event/level/LevelEvent.php

@@ -43,7 +43,7 @@ abstract class LevelEvent extends Event{
 	/**
 	 * @return Level
 	 */
-	public function getLevel(){
+	public function getLevel() : Level{
 		return $this->level;
 	}
 }

src/pocketmine/event/level/SpawnChangeEvent.php

@@ -48,7 +48,7 @@ class SpawnChangeEvent extends LevelEvent{
 	/**
 	 * @return Position
 	 */
-	public function getPreviousSpawn(){
+	public function getPreviousSpawn() : Position{
 		return $this->previousSpawn;
 	}
 }