merge queue: checking master (8a1d5f1) and #453 together

[mergify]

🎉 This pull request has been checked successfully and will be merged soon. 🎉

Branch master (8a1d5f1) and #453 are queued together for merge.

This pull request has been created by Mergify to check the mergeability of #453.
You don't need to do anything. Mergify will close this pull request automatically when it is complete.

Required conditions of queue rule default for merge:

No extra conditions.

Required conditions to stay in the queue: None

---
checking_base_sha: 8a1d5f13a81ebea71917e09d0b6f6c6dd500e784
previous_check_retries: []
previous_failed_batches: []
pull_requests:
  - number: 453
    scopes: []
scopes: []
...