Add EOF newlines where missing (bulk) (#1836)

This should solve issues with people making GitHub PRs and having the web editor messing things up. GitHub Web Editor sucks :(

src/pocketmine/level/ChunkManager.php

@@ -149,4 +149,4 @@ interface ChunkManager{
 	 * @return bool
 	 */
 	public function isInWorld(float $x, float $y, float $z) : bool;
-}
+}