chore: release 1.4.0

CHANGELOG.md

@@ -2,6 +2,18 @@
 
 This contains only the most important and/or user-facing changes; for a full changelog, see the commit history.
 
+## [1.4.0](https://github.com/ably/ably-chat-js/tree/1.4.0) (2026-05-28)
+
+### New Features
+
+- **Message Version History**: Added `room.messages.getVersions(serial)` to retrieve the full version history of a message — the original create followed by any updates and deletes — in oldest-first order. [#730](https://github.com/ably/ably-chat-js/pull/730)
+- **Idempotent REST Publishing**: Added an opt-in `idempotentRestPublishing` flag on `ChatClientOptions` (default `false`). When enabled, the SDK attaches an `idempotencyKey` to send, update, and delete message requests so the server can deduplicate retried publish attempts. [#726](https://github.com/ably/ably-chat-js/pull/726)
+
+### Bug Fixes
+
+- **Package Exports**: Reordered the `"types"` condition to appear first in `package.json` `exports` so type resolution works correctly across bundlers. [#725](https://github.com/ably/ably-chat-js/pull/725)
+- **Security**: Bumped `ws` to `8.20.1` to resolve [GHSA-58qx-3vcg-4xpx](https://github.com/advisories/GHSA-58qx-3vcg-4xpx). [#727](https://github.com/ably/ably-chat-js/pull/727)
+
 ## [1.3.1](https://github.com/ably/ably-chat-js/tree/1.3.1) (2026-03-25)
 
 ### Bug Fixes

cspell.json

@@ -20,7 +20,8 @@
     "retryable",
     "onable",
     "nonprod",
-    "deleter"
+    "deleter",
+    "GHSA"
   ],
   // This will ignore anything that's formatted like a lexicographically ordered timeserial
   "ignoreRegExpList": ["/\\d{14}-\\d{3}@.*/"],

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@ably/chat",
-  "version": "1.3.1",
+  "version": "1.4.0",
   "description": "Ably Chat is a set of purpose-built APIs for a host of chat features enabling you to create 1:1, 1:Many, Many:1 and Many:Many chat rooms for any scale. It is designed to meet a wide range of chat use cases, such as livestreams, in-game communication, customer support, or social interactions in SaaS products.",
   "type": "module",
   "main": "dist/chat/ably-chat.umd.cjs",

src/core/version.ts

@@ -1,7 +1,7 @@
 import * as Ably from 'ably';
 
 // Update this when you release a new version
-export const VERSION = '1.3.1';
+export const VERSION = '1.4.0';
 export const CHANNEL_OPTIONS_AGENT_STRING = `chat-js/${VERSION}`;
 export const CHANNEL_OPTIONS_AGENT_STRING_REACT = `chat-react/${VERSION}`;
 // Modes required for basic message functionality