commands: use new error variants for various commands

src/commands/queue/plchanges.rs

@@ -17,6 +17,8 @@ pub struct PlChangesRequest {
 
 impl CommandRequest for PlChangesRequest {
     const COMMAND: &'static str = "plchanges";
+    const MIN_ARGS: u32 = 1;
+    const MAX_ARGS: Option<u32> = Some(2);
 
     fn into_request_enum(self) -> crate::Request {
         crate::Request::PlChanges(self.version, self.window)
@@ -52,7 +54,7 @@ impl CommandRequest for PlChangesRequest {
             })
             .transpose()?;
 
-        debug_assert!(parts.next().is_none());
+        Self::throw_if_too_many_arguments(parts)?;
 
         Ok(PlChangesRequest { version, window })
     }