Prepare v4.0.0 release (1st PS 0.15.0-compatible release) (#13)

* Update the bower dependencies

* Update the changelog

Author: JordanMartinez

CHANGELOG.md

@@ -4,6 +4,16 @@ Notable changes to this project are documented in this file. The format is based
 
 ## [Unreleased]
 
+Breaking changes:
+
+New features:
+
+Bugfixes:
+
+Other improvements:
+
+## [v4.0.0](https://github.com/purescript-web/purescript-web-socket/releases/tag/v4.0.0) - 2022-04-27
+
 Breaking changes:
 - Migrate FFI to ES modules (#12 by @JordanMartinez)
 

bower.json

@@ -15,7 +15,7 @@
     "package.json"
   ],
   "dependencies": {
-    "purescript-arraybuffer-types": "main",
-    "purescript-web-file": "master"
+    "purescript-arraybuffer-types": "^3.0.2",
+    "purescript-web-file": "^4.0.0"
   }
 }