Make some constants and type aliases public

src/lib.rs

@@ -1,4 +1,4 @@
-mod consts;
+pub mod consts;
 pub mod core;
 mod decode;
 mod instructions;

src/mem.rs

@@ -7,7 +7,7 @@ use memmap2::MmapMut;
 
 use crate::consts::{Byte, DWord, HWord, Word};
 
-type PageNum = usize;
+pub type PageNum = usize;
 
 const PAGE_SIZE: usize = 4096;