Update Rust crate resend-rs to 0.18.0

[oxide-renovate]

This PR contains the following updates:

Package	Type	Update	Change
resend-rs (source)	workspace.dependencies	minor	0.15.0 -> 0.18.0

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Release Notes

resend/resend-rust (resend-rs)

v0.18.0

This is unfortunately going to break all endpoint::list calls due to backend changes. The good
news is that you can get more or less the old behavior by adding:

+use resend_rs::list_opts::ListOptions;

let _emails = resend
  .emails
  .list(
+    ListOptions::default()
  ).await?;

Changed

• Email.last_event is now a strongly typed EmailEvent enum instead of a string.
• Generalized types::ListEmailOpts to list_opts::ListOpts so it can be used in other endpoints
• Generalized types::ListEmailResponse to list_opts::ListResponse, same as above^
• The following endpoints now take a ListOptions argument and return ListResponse<T>
  • api_keys::list
  • audiences::list
  • broadcasts::list
  • contacts::list
  • domains::list

Removed

• ListApiKeyResponse
• ListAudienceResponse
• ListBroadcastResponse
• ListContactResponse
• ListDomainResponse

v0.17.1

Fixed

• The resend backend renamed the header used by the batch::send_with_batch_validation method

v0.17.0

Added

• Vec<CreateEmailOptions> now implements Idempotent (should've added this earlier, oops)
• Support for batch validation modes via BatchSvc::send_with_batch_validation
  (and SendEmailBatchResponse).
• New endpoint: emails::list

v0.16.1

Added

• Attachment::with_content_id, will replace Attachment::with_inline_content_id in the next
  major release.

v0.16.0

Added

• Attachment::with_inline_content_id
• Client::with_config allowing to create a Resend client with custom configuration
  (#​28)

Changed

• Attachment fields were made private to avoid future breaking changes when new fields are added.
  Use the Attachment for setting the fields instead.
• Tag fields were also made private.

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