Error: HonKit doesn't satisfy the requirements of this plugin: gitbook-plugin-prism require <5.0.0

> **Note**
> I understand that this plugin was create for GitBook, so if there is no room for discussion, please close

I'm using this plugin in [HonKit] forked from GitBook.
[HonKit] recently released v4.0.0 and this plugin does not work with the latest [HonKit]

Honkit requires a gitbook or honkit description in the engines description, with the gitbook definition taking precedence

https://github.com/honkit/honkit/blob/32e906fc392accc23940e99e284efea005398544/packages/honkit/src/plugins/validatePlugin.ts#L18-L19

The engines definition of gitbook-plugin-prism is not intended for use with v4.0.0, so you will get an error if you try to use this plugin with Honkit

https://github.com/gaearon/gitbook-plugin-prism/blob/34f434cbec867413ad9ae3c4302049318873d00a/package.json#L10-L12

```zsh
% node -v
v18.4.0
% honkit -V
4.0.0
% honkit build
...
Error: HonKit doesn't satisfy the requirements of this plugin: gitbook-plugin-prism require <5.0.0
at validatePlugin (/path-to-honkit/node_modules/honkit/lib/plugins/validatePlugin.js:29:41)
at /path-to-honkit/node_modules/honkit/lib/plugins/loadPlugin.js:81:56
at _fulfilled (/path-to-honkit/node_modules/q/q.js:854:54)
at /path-to-honkit/node_modules/q/q.js:883:30
at Promise.promise.promiseDispatch (/path-to-honkit/node_modules/q/q.js:816:13)
at /path-to-honkit/node_modules/q/q.js:570:49
at runSingle (/path-to-honkit/node_modules/q/q.js:137:13)
at flush (/path-to-honkit/node_modules/q/q.js:125:13)
at process.processTicksAndRejections (node:internal/process/task_queues:77:11)
```

I'm considering the following options. I would like to hear opinions.

- Remove <4.0.0 from the engine definition
- Fork this repository and create a new `honkit-plugin-prism`.

Please let me know if there is a better way other than the above.
I'm prepared to create a pull request to resolve this issue.

[HonKit]: https://github.com/honkit/honkit