move hashers to core mod for adding future mods

src/bin/picca.rs

@@ -8,7 +8,7 @@ use std::sync::{Arc, Mutex};
 use std::thread::{self, JoinHandle, available_parallelism};
 
 use picca::message;
-use picca::hashers;
+use picca::core::hashers;
 
 const ALGORITHMS: [&'static str; 44] = [
   "ascon",

src/core.rs

@@ -0,0 +1 @@
+pub mod hashers;

src/lib.rs

@@ -1,2 +1,2 @@
 pub mod message;
-pub mod hashers;
+pub mod core;