chore(main): release server-sdk 1.21.0 (#1353)

🤖 I have created a release *beep* *boop*
---


##
[1.21.0](server-sdk-v1.20.2...server-sdk-v1.21.0)
(2026-04-21)


### ✨ New Features

* add "sideEffects": false to package.json files for all packages
([#1343](#1343))
([d8e968e](d8e968e))
* support type-safe flag keys via module augmentation
([#1349](#1349))
([fb2ed4a](fb2ed4a))
* support type-safe variant values for InMemoryProvider
([#1356](#1356))
([431f899](431f899))


### 🧹 Chore

* replace test-harness submodule with spec submodule
([#1359](#1359))
([7924205](7924205))


### 📚 Documentation

* fix inaccuracies in package READMEs
([#1378](#1378))
([ecd3759](ecd3759))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

---------

Signed-off-by: OpenFeature Bot <109696520+openfeaturebot@users.noreply.github.com>
Signed-off-by: Todd Baert <todd.baert@dynatrace.com>
Co-authored-by: Todd Baert <todd.baert@dynatrace.com>

Author: openfeaturebot

.release-please-manifest.json

@@ -2,7 +2,7 @@
   "packages/nest": "0.2.5",
   "packages/react": "1.2.1",
   "packages/web": "1.8.0",
-  "packages/server": "1.20.2",
+  "packages/server": "1.21.0",
   "packages/shared": "1.10.0",
   "packages/angular/projects/angular-sdk": "1.1.0"
 }

packages/server/CHANGELOG.md

@@ -1,5 +1,24 @@
 # Changelog
 
+## [1.21.0](https://github.com/open-feature/js-sdk/compare/server-sdk-v1.20.2...server-sdk-v1.21.0) (2026-04-21)
+
+
+### ✨ New Features
+
+* add "sideEffects": false to package.json files for all packages ([#1343](https://github.com/open-feature/js-sdk/issues/1343)) ([d8e968e](https://github.com/open-feature/js-sdk/commit/d8e968ed2513fe986a6500895f3399303a2f0b96))
+* support type-safe flag keys via module augmentation ([#1349](https://github.com/open-feature/js-sdk/issues/1349)) ([fb2ed4a](https://github.com/open-feature/js-sdk/commit/fb2ed4a7d64d9b8437975a0ef6cb4fe6a12dd671))
+* support type-safe variant values for InMemoryProvider ([#1356](https://github.com/open-feature/js-sdk/issues/1356)) ([431f899](https://github.com/open-feature/js-sdk/commit/431f899191a2f7693fea9fab40f7cfb1f22f61f8))
+
+
+### 🧹 Chore
+
+* replace test-harness submodule with spec submodule ([#1359](https://github.com/open-feature/js-sdk/issues/1359)) ([7924205](https://github.com/open-feature/js-sdk/commit/7924205b8b1ba6f4b25d27d45541c87c14d89737))
+
+
+### 📚 Documentation
+
+* fix inaccuracies in package READMEs ([#1378](https://github.com/open-feature/js-sdk/issues/1378)) ([ecd3759](https://github.com/open-feature/js-sdk/commit/ecd375979e3188c0f94dfec94a1487c61388965e))
+
 ## [1.20.2](https://github.com/open-feature/js-sdk/compare/server-sdk-v1.20.1...server-sdk-v1.20.2) (2026-02-18)
 
 

packages/server/README.md

@@ -16,8 +16,8 @@
     <img alt="Specification" src="https://img.shields.io/static/v1?label=specification&message=v0.8.0&color=yellow&style=for-the-badge" />
   </a>
   <!-- x-release-please-start-version -->
-  <a href="https://github.com/open-feature/js-sdk/releases/tag/server-sdk-v1.20.2">
-    <img alt="Release" src="https://img.shields.io/static/v1?label=release&message=v1.20.2&color=blue&style=for-the-badge" />
+  <a href="https://github.com/open-feature/js-sdk/releases/tag/server-sdk-v1.21.0">
+    <img alt="Release" src="https://img.shields.io/static/v1?label=release&message=v1.21.0&color=blue&style=for-the-badge" />
   </a>
   <!-- x-release-please-end -->
   <br/>

packages/server/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@openfeature/server-sdk",
-  "version": "1.20.2",
+  "version": "1.21.0",
   "description": "OpenFeature SDK for JavaScript",
   "main": "./dist/cjs/index.js",
   "files": [
@@ -48,7 +48,7 @@
     "node": ">=20"
   },
   "peerDependencies": {
-    "@openfeature/core": "^1.9.2"
+    "@openfeature/core": "^1.10.0"
   },
   "devDependencies": {
     "@openfeature/core": "^1.9.2"