Flutter 2 compatibility

[zmeggyesi]

Motivation

Since Flutter 2 has been de facto mandated since its release (by Google upgrading all its core packages and requiring users to do so as well), w_transport should be upgraded to match. However, the nature of dependencies with other Workiva-internal packages is making this quite difficult to do form the outside, so I started to unravel the web of dependencies.

Changes

Upgrade package dependencies to Flutter 2 compatibility

Release Notes

Upgrade package dependencies to Flutter 2 compatibility

Review

See CONTRIBUTING.md for more details on review types (+1 / QA +1 / +10) and code review process.

Please review:

QA Checklist

• Tests were updated and provide good coverage of the changeset and other affected code
• Manual testing was performed if needed
  • Steps from PR author:
  • Anything falling under manual testing criteria outlined in CONTRIBUTING.md

Merge Checklist

While we perform many automated checks before auto-merging, some manual checks are needed:

• A Client Platform member has reviewed these changes
• There are no unaddressed comments - this check can be automated if reviewers use the "Request Changes" feature
• For release PRs - Version metadata in Rosie comment is correct

related Workiva/w_transport#345

[aviary3-wk]

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

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