Fixed some missing function imports

these weren't getting corrected since php-cs-fixer 3.0 due to a change in the default configuration for native_function_invocation. Since the builds are randomly choosing to use php-cs-fixer 2.19 at the moment, the consistency is a problem.

src/console/ConsoleReaderChildProcess.php

@@ -26,6 +26,7 @@ namespace pocketmine\console;
 use function cli_set_process_title;
 use function count;
 use function dirname;
+use function feof;
 use function fwrite;
 use function stream_socket_client;