revamp changelog commands

Author: Emilgardis

xtask/src/changelog.rs

@@ -5,6 +5,8 @@ use std::fs;
 use std::path::Path;
 
 use crate::util::{project_dir, write_to_string};
+use chrono::{Datelike, Utc};
+use clap::{Args, Subcommand};
 use cross::shell::MessageInfo;
 
 use chrono::{Datelike, Utc};