ensure sync

Signed-off-by: Alex Chi <iskyzh@gmail.com>

mini-lsm/src/block.rs

@@ -5,7 +5,7 @@ pub use builder::BlockBuilder;
 use bytes::{Buf, BufMut, Bytes};
 pub use iterator::BlockIterator;
 
-pub const SIZEOF_U16: usize = std::mem::size_of::<u16>();
+pub(crate) const SIZEOF_U16: usize = std::mem::size_of::<u16>();
 
 /// A block is the smallest unit of read and caching in LSM tree. It is a collection of sorted
 /// key-value pairs.