chore: prepare v1.4.0 release notes

CHANGELOG.md

@@ -0,0 +1,44 @@
+# Changelog
+
+All notable changes to `hy-event-store` are documented in this file.
+
+## 1.4.0 (unreleased)
+
+### Added
+
+- Add automated regression tests and continuous integration for Node.js 18,
+  20, 22, 24, and 26.
+- Add contribution, security-reporting, and maintenance guidance.
+
+### Changed
+
+- Return action results from `dispatch`, including Promise values, so callers
+  can consume or await them. This follows the contribution proposed by
+  [@Thunder7991](https://github.com/Thunder7991) in
+  [PR #32](https://github.com/coderwhy/hy-event-store/pull/32).
+- Validate store options, state keys, action names, event names, and callbacks
+  with clearer errors.
+- Make multi-state listener registration and removal atomic when validation
+  fails.
+- Remove the unused Axios development dependency and limit the published
+  package to runtime source and project documentation.
+
+### Fixed
+
+- Prevent `once` listeners from skipping the next listener during emission.
+- Make `off` safe when an event has no listeners.
+- Repair `clear` and `hasEvent` so they operate on the event registry.
+- Support event names that overlap with object prototype properties, including
+  `constructor`, `toString`, and `__proto__`.
+
+### Compatibility notes
+
+- Existing CommonJS imports remain unchanged.
+- State keys must be declared in the initial `state` object. `setState` now
+  throws for unknown keys instead of creating values that cannot be observed.
+- No runtime dependencies are added.
+
+## 1.3.1 - 2023-04-21
+
+- Previous npm release. Earlier changes were not maintained in a repository
+  changelog.

package.json

@@ -1,10 +1,11 @@
 {
   "name": "hy-event-store",
-  "version": "1.3.1",
+  "version": "1.4.0",
   "description": "A zero-dependency event bus and global state store for Vue, React, Mini Programs, and vanilla JavaScript.",
   "main": "src/index.js",
   "files": [
-    "src"
+    "src",
+    "CHANGELOG.md"
   ],
   "scripts": {
     "test": "node --test Test/*.test.js",