Description

The v3 migration docs did not mention the logger configuration rename from Output to Stream, leaving a gap for users upgrading. This update records the rename, rewords the note for consistency with the section tone, and aligns the logger example to the new field.

• Migration note: Calls out the logger.Config Output → Stream rename in the Logger section with updated wording.
• Example alignment: Updates the logger middleware example to use Stream.

app.Use(logger.New(logger.Config{
    Stream: logger.LoggerToWriter(zap, log.LevelDebug),
}))

Changes introduced

• Benchmarks: Not applicable.
• Documentation Update: Updated docs/whats_new.md (Logger section).
• Changelog/What's New: Added the Output → Stream migration note.
• Migration Guide: Not required beyond the What's New note.
• API Alignment with Express: Not applicable.
• API Longevity: Not applicable.
• Examples: Updated logger example to use Stream.

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)
• Enhancement (improvement to existing features and functionality)
• Documentation update (changes to documentation)
• Performance improvement (non-breaking change which improves efficiency)
• Code consistency (non-breaking change which improves code reliability and robustness)

Checklist

Before you submit your pull request, please make sure you meet these requirements:

• Followed the inspiration of the Express.js framework for new functionalities, making them similar in usage.
• Conducted a self-review of the code and provided comments for complex or critical parts.
• Updated the documentation in the /docs/ directory for Fiber's documentation.
• Added or updated unit tests to validate the effectiveness of the changes or new features.
• Ensured that new and existing unit tests pass locally with the changes.
• Verified that any new dependencies are essential and have been agreed upon by the maintainers/community.
• Aimed for optimal performance with minimal allocations in the new code.
• Provided benchmarks for the new code to analyze and improve upon.

Commit formatting

Please use emojis in commit messages for an easy way to identify the purpose or intention of a commit. Check out the emoji cheatsheet here: CONTRIBUTING.md

• Fixes 🧹 [Maintenance]: Add logger.Output -> logger.Stream change to whats_new.md #4056

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