phpstan: define LEVELDB_ZLIB_RAW_COMPRESSION if it doesn't exist (for phpstan)

this improves the analysis quality by informing phpstan of the type of whatever should be there.

phpstan.neon.dist

@@ -2,7 +2,6 @@ includes:
 	- tests/phpstan/configs/actual-problems.neon
 	- tests/phpstan/configs/check-explicit-mixed-baseline.neon
 	- tests/phpstan/configs/com-dotnet-magic.neon
-	- tests/phpstan/configs/custom-leveldb.neon
 	- tests/phpstan/configs/gc-hacks.neon
 	- tests/phpstan/configs/l7-baseline.neon
 	- tests/phpstan/configs/l8-baseline.neon

tests/phpstan/bootstrap.php

@@ -23,6 +23,11 @@ declare(strict_types=1);
 
 define('pocketmine\_PHPSTAN_ANALYSIS', true);
 
+if(!defined('LEVELDB_ZLIB_RAW_COMPRESSION')){
+	//leveldb might not be loaded
+	define('LEVELDB_ZLIB_RAW_COMPRESSION', 4);
+}
+
 //TODO: these need to be defined properly or removed
 define('pocketmine\COMPOSER_AUTOLOADER_PATH', dirname(__DIR__, 2) . '/vendor/autoload.php');
 define('pocketmine\DATA', '');

tests/phpstan/configs/custom-leveldb.neon

@@ -1,12 +0,0 @@
-parameters:
-	ignoreErrors:
-		#TODO: use custom stubs
-		-
-			message: "#^Used constant LEVELDB_ZLIB_RAW_COMPRESSION not found\\.$#"
-			count: 1
-			path: ../../../src/pocketmine/level/format/io/leveldb/LevelDB.php
-
-		-
-			message: "#^Constant LEVELDB_ZLIB_RAW_COMPRESSION not found\\.$#"
-			count: 1
-			path: ../../../src/pocketmine/level/format/io/leveldb/LevelDB.php