Can't get assets by entry point chunk name in v4

Congrats on the new major version guys.

Expected behaviour

In v3, it was possible to obtain chunk assets by accessing htmlWebpackPlugin.files.chunks[entryName].entry from the template.

Current behaviour

According to https://github.com/jantimon/html-webpack-plugin/blob/master/CHANGELOG.md#breaking-changes there's a breaking change affecting such feature:

The chunks property was removed and the js and css property was converted from a string into an object { entryName: string, path: string}

According to that, one would expect js and css properties in htmlWebpackPlugin.files to contain the mentioned object but I still get the same array of strings as in v3:

{
  ...,
  "files": {
    "publicPath": "",
    "js": [
      "scripts/main.js",
      "scripts/service-worker.js",
      "scripts/ping-worker.js"
    ],
    "css": [
      "styles/main.css"
    ]
  },
  ...
}

Environment

Tell us which operating system you are using, as well as which versions of Node.js, npm, webpack, and html-webpack-plugin. Run the following to get it quickly:

~/projects/lag (dependabot/npm_and_yarn/html-webpack-plugin-4.0.1, Node v12.11.1)
❯ node -e "var os=require('os');console.log('Node.js ' + process.version + '\n' + os.platform() + ' ' + os.release())"
npm --version
npm ls webpack
npm ls html-webpack-plugin
Node.js v12.11.1
darwin 19.3.0~/projects/lag (dependabot/npm_and_yarn/html-webpack-plugin-4.0.1, Node v12.11.1)
❯ npm --version
npm ls webpack
npm ls html-webpack-plugin
6.13.7
~/projects/lag (dependabot/npm_and_yarn/html-webpack-plugin-4.0.1, Node v12.11.1)
❯ npm ls webpack
npm ls html-webpack-plugin
[email protected] /Users/frosas/projects/lag
└── [email protected] 
~/projects/lag (dependabot/npm_and_yarn/html-webpack-plugin-4.0.1, Node v12.11.1)
❯ npm ls html-webpack-plugin
[email protected] /Users/frosas/projects/lag
└── [email protected] 

Config

Copy the minimal webpack.config.js to produce this issue:

https://github.com/frosas/lag/blob/f82961175485b1540cefc7f48bc251dad83df10b/webpack.config.js#L55-L71

Copy your template file if it is part of this issue:

https://github.com/frosas/lag/blob/f82961175485b1540cefc7f48bc251dad83df10b/html/index.ejs

Additional context

I couldn't find any reference to entryName in the plugin code that suggested the new behavior was actually implemented.

Also, htmlWebpackPlugin.files section in https://github.com/jantimon/html-webpack-plugin/blob/master/README.md seems outdated now.