feat: Add pest and pest_derive dependencies

src/filter_plugin/head.rs

@@ -48,16 +48,6 @@ impl FilterPlugin for HeadBytesFilter {
             }
         ]
     }
-    
-    fn options(&self) -> Vec<FilterOption> {
-        vec![
-            FilterOption {
-                name: "count".to_string(),
-                default: None,
-                required: true,
-            }
-        ]
-    }
 }
 
 pub struct HeadLinesFilter {