0.2.0

Note: This release matches what was published to crates.io as 0.2.0 (~08:46 UTC). Items that landed only in git afterward are in 0.2.1 and 0.2.2.

Added

• Cancellation — CancellationToken (from tokio-util), RequestBuilder::cancellation_token(), and Error::Cancelled with cooperative abort during requests and retry backoff.
• Throw mode — RequestBuilder::throw_on_error(true) returns Err on non-2xx from send() (like upstream throw: true).
• Form bodies — RequestBuilder::form([...]) for application/x-www-form-urlencoded.
• Multipart — RequestBuilder::multipart(form) behind the multipart feature; re-export better_fetch::multipart for reqwest::multipart::Form.
• Typed endpoints — EndpointRequestBuilder via client.call::<E>(), with EndpointParams / EndpointQuery and typed send_json().
• Retry — Retry-After header support, jitter on backoff, 408 in default retry codes; RetryPolicy::Count keeps with_should_retry without converting to linear.
• Plugins — PreparedRequest now includes method and headers in init (after auth).
• Dependencies — indexmap (stable query order), tokio-util, fastrand (lightweight).
• Example multipart and integration tests for cancel, throw, form, multipart, query order, and retry edge cases.

Changed

• ClientBuilder::build() — requires .base_url(...); returns Error::MissingBaseUrl instead of defaulting to http://localhost (breaking).
• Query parameters — stored in IndexMap so URL query strings follow insertion order.
• HttpBackend::execute — takes HttpRequest by value; client reuses one built request per attempt (no full clone per retry for byte bodies).
• ClientConfig — pre-merges plugin hooks at build time (merged_hooks).
• Multipart + retry — automatic retry is rejected with a clear error if a multipart body was used (multipart forms are not cloneable).

Full notes: CHANGELOG.md