hotfix: use default hasher from hashmap module

Author: edwinkys

src/db/mod.rs

@@ -5,8 +5,9 @@ use crate::collection::*;
 use crate::func::err::Error;
 use serde::{Deserialize, Serialize};
 use sled::Db;
+use std::collections::hash_map::DefaultHasher;
 use std::fs::{create_dir_all, remove_dir_all, remove_file, OpenOptions};
-use std::hash::{DefaultHasher, Hash, Hasher};
+use std::hash::{Hash, Hasher};
 use std::io::{BufReader, BufWriter, Read, Write};
 use std::path::Path;
 use std::time::{SystemTime, UNIX_EPOCH};