refactor: move dynamic_label.rs to dynamic_string.rs and fix failing test

src/main.rs

@@ -8,7 +8,7 @@ mod modules;
 mod popup;
 mod script;
 mod style;
-mod widgets;
+mod dynamic_string;
 
 use crate::bar::create_bar;
 use crate::config::{Config, MonitorConfig};