simplify agents initialization

src/lib.rs

@@ -558,7 +558,7 @@ pub fn run(config: Config, rle: Option<String>) -> Result<()> {
     }
     .map_err(Error::Read)?;
 
-    let mut agents: Vec<Agent> = Vec::new();
+    let mut agents = Vec::<Agent>::new();
 
     for _ in 0..config.gen_depth {
         let mut pop = Population::new(&config, map.clone());