grow_on_mount (#269)

Author: Jason2866

libraries/LittleFS/src/LittleFS.cpp

@@ -83,6 +83,7 @@ bool LittleFSFS::begin(bool formatOnFail, const char * basePath, uint8_t maxOpen
       .partition_label = partitionLabel_,
       .format_if_mount_failed = false,
       .dont_mount = false
+      .grow_on_mount = true
     };
 
     esp_err_t err = esp_vfs_littlefs_register(&conf);