Update changelog and version

Author: acolytec3

CHANGELOG.md

@@ -5,6 +5,11 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 (modification: no type change headlines) and this project adheres to 
 [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## 0.4.0 - 2024-03-8
+
+- Revise API to remove top-level await and replace with an async initatior `initRustBN`, PR [#12](https://github.com/ethereumjs/rustbn-wasm/pull/12)
+- Update library readme and usage instructions, PR [#13](https://github.com/ethereumjs/rustbn-wasm/pull/13)
+
 ## 0.3.0 - 2024-02-14
 
 - Improved (older version) ESM support (❤️ to @roninjin10 for the contribution), PR [#7](https://github.com/ethereumjs/rustbn-wasm/pull/7)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "rustbn-wasm",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "Javascript bindings for https://github.com/paritytech/bn (using WASM)",
   "keywords": [
     "ethereum",