[deps]: Update Rust crate darling to 0.21.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	Pending
darling	dependencies	minor	0.20.10 -> 0.21.0	0.21.2

---

Release Notes

TedDriggs/darling (darling)

v0.21.1

Compare Source

• Track all alternate field names, and show them in error message if there aren't too many. #​325
• Track all alternate values for enum variants, and show them in error messages if there aren't too many. #​362

v0.21.0

Compare Source

• Potentially breaking: Emit error when an attribute path is present in both attributes and forward_attrs. #​336
• Support parsing attributes which contain keywords #​238
• Add SpannedValue::into_inner #​342
• Add #[darling(derive_syn_parse)] to also impl syn::parse::Parse when deriving FromMeta #​285
• Make impl FromMeta for syn::TypePath support both quote-wrapped and bare values #​351
• Add util::PreservedStrExpr #​346
• Impl UsesTypeParams and UsesLifetimes for WithOriginal #​215
• Update error message emitted by <() as FromMeta>::from_list to allow use of () as a #[darling(flatten)] target #​353

---

Configuration

📅 Schedule: Branch creation - "every 2nd week starting on the 2 week of the year before 4am on Monday" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: Cargo.lock

Command failed: cargo update --config net.git-fetch-with-cli=true --manifest-path crates/bitwarden-error-macro/Cargo.toml --package [email protected] --precise 0.21.1
    Updating crates.io index
error: failed to select a version for the requirement `darling = "^0.20"`
candidate versions found which didn't match: 0.21.1
location searched: crates.io index
required by package `validator_derive v0.20.0`
    ... which satisfies dependency `validator_derive = "^0.20"` (locked to 0.20.0) of package `validator v0.20.0`
    ... which satisfies dependency `validator = ">=0.18.1, <0.21"` (locked to 0.20.0) of package `bitwarden-sm v1.0.0 (/tmp/renovate/repos/github/bitwarden/sdk-internal/bitwarden_license/bitwarden-sm)`

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.15%. Comparing base (20e3dfa) to head (2a8c1e3).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #391      +/-   ##
==========================================
- Coverage   74.19%   74.15%   -0.05%     
==========================================
  Files         253      253              
  Lines       21897    21897              
==========================================
- Hits        16247    16238       -9     
- Misses       5650     5659       +9     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[bitwarden-bot]

Internal tracking:

• ID: PM-24917
• Link: https://bitwarden.atlassian.net/browse/PM-24917