Update version for the next release (v0.21.0)

[bidoubiwa]

This version makes this package compatible with Meilisearch v0.30.0 🎉
Check out the changelog of Meilisearch v0.30.0 for more information on the changes.

🚀 Enhancements

• New pagination strategy with the search parameterspage and hitsPerPage Add pagination feature for v0.30.0 #374
• New bulder methods on get_tasks: with_uids, with_before_enqueued_at, ... see Add tasks filters for v0.30.0 #375
• New client.cancel_tasks method that lets you cancel enqueued and processing tasks Add cancel task for v0.30.0 #377
• New client.delete_tasks method that lets you delete tasks Add delete tasks for v0.30.0 #381
• New client.swap_indexes method that lets you swap two indexes Add swap indexes for v0.30.0 #382

⚠️ Breaking change

• builder functions on TasksQuery name changes: Add tasks filters for v0.30.0 #375
  • with_status -> with_statuses
  • with_index_uid -> with_index_uids
  • with_type -> with_types
• Task detail receivedDocumentIds renamed to providedIds Add provided_ids detail setting for v0.30.0 #393
• Error field in Task is now always present and has a None value when there are no errors Add error field in all types of task status for v0.30.0 #390
• Add and rename some error codes: Add missing_master_key error code for v0.30.0 #384

[alallema]

LGTM! 👾

[bidoubiwa]

bors merge

[bors]

Build succeeded:

• clippy-check
• integration-tests
• readme-check
• rust-format
• wasm-build