RM-178586 Release dart_dev 4.0.0

[rmconsole-readonly-wk]

Pull Requests included in release:

• Major changes:
  • Migrate to null safety
• Patch changes:
  • Raise analyzer minimum & unpin meta
  • FEDX-13: Dart 2.18 lints & formatting

Requested by: @robbecker-wf

Diff Between Last Tag and Proposed Release: https://github.com/Workiva/dart_dev/compare/3.9.2...Workiva:release_dart_dev_4.0.0 Diff Between Last Tag and New Tag: https://github.com/Workiva/dart_dev/compare/3.9.2...4.0.0

The logs for the request that created this PR can be found here This pull request can be recreated by clicking here

[aviary-wf]

Security Insights

No security relevant content was detected by automated scans.

Action Items

• Review PR for security impact; comment "security review required" if needed or unsure

• Verify aviary.yaml coverage of security relevant code

  Questions or Comments? Reach out on Slack: #support-infosec.

[robbecker-wf]

@Workiva/release-management-p