chore(release): 4.0.0 [skip ci]

# [4.0.0](v3.1.0...v4.0.0) (2021-06-18)

### chore

* rebrand AdminBro to AdminJS ([5d0dd3c](5d0dd3c))

### BREAKING CHANGES

* AdminBro has been rebranded to AdminJS. All package and repository names had been updated.
1. Update your dependencies to use new `adminjs` packages.
- `admin-bro` -> `adminjs` for the core package
- `@admin-bro/<package name>` -> `@adminjs/<package name>` for other modules
2. Update your custom CSS classes:
- `.admin-bro_<component name>` -> `.adminjs_<component name>` (example: `.adminjs_Box`)
3. Search your project for `admin-bro` occurrences - most likely they will have to be updated to `adminjs`

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@adminjs/express",
-  "version": "3.1.0",
+  "version": "4.0.0",
   "description": "This is an official AdminJS plugin which integrates it with Express.js framework",
   "main": "lib/index.js",
   "scripts": {