chore(main): release server-sdk 1.21.0

[openfeaturebot]

🤖 I have created a release beep boop

1.21.0 (2026-02-21)

✨ New Features

• add "sideEffects": false to package.json files for all packages (#1343) (d8e968e)

Dependencies

• The following workspace dependencies were updated
  • devDependencies
    • @openfeature/core bumped from ^1.9.2 to ^1.10.0

---

This PR was generated with Release Please. See documentation.

[gemini-code-assist]

Summary of Changes

Hello @openfeaturebot, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request automates the release of server-sdk version 1.21.0. It incorporates a new feature that adds sideEffects: false to package.json files for improved tree-shaking, alongside an update to the @openfeature/core development dependency.

Highlights

• New Feature: Added "sideEffects": false to package.json files across all packages, which helps bundlers with tree-shaking.
• Dependency Update: Updated the @openfeature/core devDependency from ^1.9.2 to ^1.10.0.

Changelog

• .release-please-manifest.json
  • Updated the packages/server version to 1.21.0.
• packages/server/CHANGELOG.md
  • Added a new changelog entry for version 1.21.0, detailing a new feature and a dependency update.
• packages/server/README.md
  • Updated the release badge to reflect version 1.21.0.
• packages/server/package.json
  • Updated the package version to 1.21.0.
  • Bumped the @openfeature/core devDependency from ^1.9.2 to ^1.10.0.

Activity

• This pull request was automatically generated by Release Please to create version 1.21.0 of the server-sdk.

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[gemini-code-assist]

Code Review

This pull request is an automated release for server-sdk version 1.21.0. The changes primarily consist of version bumps in package.json, CHANGELOG.md, and README.md, and an update to the @openfeature/core dev dependency. My review identifies a potential issue with an outdated peerDependency for @openfeature/core in packages/server/package.json, which should be updated to match the new version in devDependencies to avoid potential runtime issues for consumers of the SDK.

[gemini-code-assist]

The devDependencies for @openfeature/core is being updated to ^1.10.0, but the peerDependencies on line 51 remains ^1.9.2.

While ^1.9.2 technically includes 1.10.0, this discrepancy can be problematic. If server-sdk now relies on new features or bug fixes from @openfeature/core@1.10.0, consumers using an older version of @openfeature/core (like 1.9.2) might encounter runtime errors.

It's a best practice to keep peerDependencies and devDependencies in sync for shared dependencies to clearly communicate the minimum required version. Please consider updating the peerDependencies to ^1.10.0 as well.

"peerDependencies": {
  "@openfeature/core": "^1.10.0"
}