feat: make clippy happy & update denpendencies

src/db.rs

@@ -1,7 +1,7 @@
 use rusqlite::{Connection, params};
 use rust_util::{debugging, information, opt_result, simple_error, success, XResult};
 
-pub const DEFAULT_MASTER_KEY_VERIFICATION_KEY: &'static str = "__master_verification_key";
+pub const DEFAULT_MASTER_KEY_VERIFICATION_KEY: &str = "__master_verification_key";
 
 pub struct Key {
     pub name: String,
@@ -44,7 +44,7 @@ pub fn insert_key(conn: &Connection, key: &Key) -> XResult<()> {
     let default_comment = "".to_string();
     let _ = conn.execute(
         "INSERT INTO keys (name, value, comment) VALUES (?1, ?2, ?3)",
-        (&key.name, &key.encrypted_key, key.comment.as_ref().unwrap_or_else(|| &default_comment)),
+        (&key.name, &key.encrypted_key, key.comment.as_ref().unwrap_or(&default_comment)),
     )?;
     Ok(())
 }