Add missing_master_key error code for v0.30.0 (#384)

* Add missing_master_key error code

* Fix clippy error

Author: bidoubiwa

src/errors.rs

@@ -139,6 +139,7 @@ pub enum ErrorCode {
     MissingAuthorizationHeader,
     TaskNotFound,
     DumpNotFound,
+    MssingMasterKey,
     NoSpaceLeftOnDevice,
     PayloadTooLarge,
     UnretrievableDocument,

src/tasks.rs

@@ -255,6 +255,7 @@ impl Task {
     /// # index.delete().await.unwrap().wait_for_completion(&client, None, None).await.unwrap();
     /// # });
     /// ```
+    #[allow(clippy::result_large_err)] // Since `self` has been consumed, this is not an issue
     pub fn try_make_index(self, client: &Client) -> Result<Index, Self> {
         match self {
             Self::Succeeded {