fix some pedantic lints

src/main.rs

@@ -3,7 +3,7 @@ use anyhow::{Context, Result};
 use pacdef::{args, Group, Pacdef};
 
 fn main() -> Result<()> {
-    let args = args::get_args();
+    let args = args::get();
     let groups = Group::load_from_dir()?;
     let pacdef = Pacdef::new(args, groups);
     pacdef.run_action_from_arg().context("running action")