fix: apply clippy suggestions (#120)

* fix: apply clippy suggestions

* fmt

* clippy for linux targets

plugins/authenticator/src/auth.rs

@@ -154,7 +154,7 @@ pub fn sign(
 
             let sig = encode_config(sign_data, URL_SAFE_NO_PAD);
 
-            println!("Sign result: {}", sig);
+            println!("Sign result: {sig}");
             println!(
                 "Key handle used: {}",
                 encode_config(&handle_used, URL_SAFE_NO_PAD)
@@ -173,10 +173,8 @@ pub fn sign(
 }
 
 fn format_client_data(application: &str, challenge: &str) -> (Vec<u8>, Vec<u8>, String) {
-    let d = format!(
-        r#"{{"challenge": "{}", "version": "U2F_V2", "appId": "{}"}}"#,
-        challenge, application
-    );
+    let d =
+        format!(r#"{{"challenge": "{challenge}", "version": "U2F_V2", "appId": "{application}"}}"#);
     let mut challenge = Sha256::new();
     challenge.update(d.as_bytes());
     let chall_bytes = challenge.finalize().to_vec();

plugins/authenticator/src/u2f.rs

@@ -16,7 +16,7 @@ pub fn make_challenge(app_id: &str, challenge_bytes: Vec<u8>) -> Challenge {
     let utc: DateTime<Utc> = Utc::now();
     Challenge {
         challenge: encode_config(challenge_bytes, URL_SAFE_NO_PAD),
-        timestamp: format!("{:?}", utc),
+        timestamp: format!("{utc:?}"),
         app_id: app_id.to_string(),
     }
 }