chore(main): release launchdarkly_event_source_client 2.1.0 (#268)

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


##
[2.1.0](launchdarkly_event_source_client-v2.0.1...launchdarkly_event_source_client-v2.1.0)
(2026-05-26)


### Features

* add isClosed observer to TestSseClient
([#271](#271))
([2994ce9](2994ce9))
* add SSECapability surface to SSEClient
([#266](#266))
([c78480c](c78480c))

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

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Release-metadata-only changes (version, changelog, manifest); no
runtime code in the diff.
> 
> **Overview**
> This PR **bumps** `launchdarkly_event_source_client` from **2.0.1** to
**2.1.0** as a Release Please cut: it updates
`packages/event_source_client/pubspec.yaml`, adds the **2.1.0** section
to `CHANGELOG.md`, and sets `packages/event_source_client` to **2.1.0**
in `.release-please-manifest.json`. There is **no application or library
source** in the diff.
> 
> The new changelog entry documents what ships in this version: an
**`SSECapability`** API on **`SSEClient`** (runtime capability checks,
e.g. custom request headers) and an **`isClosed`** getter on
**`TestSseClient`** for tests. Those behaviors are already on the
branch; this PR only publishes the semver and release notes.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
62c2248. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: LaunchDarklyReleaseBot

.release-please-manifest.json

@@ -1 +1 @@
-{"packages/common":"1.8.0","packages/common_client":"1.9.0","packages/event_source_client":"2.0.1","packages/flutter_client_sdk":"4.16.0"}
+{"packages/common":"1.8.0","packages/common_client":"1.9.0","packages/event_source_client":"2.1.0","packages/flutter_client_sdk":"4.16.0"}

packages/event_source_client/CHANGELOG.md

@@ -2,6 +2,14 @@
 
 All notable changes to the LaunchDarkly Event Source Client SDK will be documented in this file. This project adheres to [Semantic Versioning](https://semver.org).
 
+## [2.1.0](https://github.com/launchdarkly/flutter-client-sdk/compare/launchdarkly_event_source_client-v2.0.1...launchdarkly_event_source_client-v2.1.0) (2026-05-26)
+
+
+### Features
+
+* add isClosed observer to TestSseClient ([#271](https://github.com/launchdarkly/flutter-client-sdk/issues/271)) ([2994ce9](https://github.com/launchdarkly/flutter-client-sdk/commit/2994ce9a7095f88760942d5e80f9ca1976e6ebb3))
+* add SSECapability surface to SSEClient ([#266](https://github.com/launchdarkly/flutter-client-sdk/issues/266)) ([c78480c](https://github.com/launchdarkly/flutter-client-sdk/commit/c78480c5cb6a7196d5c3d0e25c75eb56a77b043c))
+
 ## [2.0.1](https://github.com/launchdarkly/flutter-client-sdk/compare/launchdarkly_event_source_client-v2.0.0...launchdarkly_event_source_client-v2.0.1) (2025-09-04)
 
 

packages/event_source_client/pubspec.yaml

@@ -1,6 +1,6 @@
 name: launchdarkly_event_source_client
 description: Server-sent events (SSE) client implementation for dart and flutter.
-version: 2.0.1
+version: 2.1.0
 homepage: https://github.com/launchdarkly/flutter-client-sdk
 repository: https://github.com/launchdarkly/flutter-client-sdk/tree/main/packages/event_source_client