Issue on Next 12 - CommonJS script issue

Hello

I recently updated a project of mine to Next 12 and then also updated the `converkit-react` library to `1.5.5`.

When I startup the project and load my page with the form on it I now get the following error.

```
error - unhandledRejection: ReferenceError: require is not defined in ES module scope, you can use import instead
This file is being treated as an ES module because it has a '.js' file extension and '/workspaces/project/node_modules/convertkit-react/package.json' contains "type": "module". To treat it as a CommonJS script, rename it to use the '.cjs' file extension.
```

I do not think I am going anything special. This is a vanilla next project and I import the form with the following.

```
import ConvertKitForm from 'convertkit-react';
```

I am not sure what might be going wrong here but I see in the project history there was a release specifically for Next around commonjs a few releases back.

Maybe something has changed with Next 12?

Reproduce the error in a vanilla Next 12 project using the shown ConvertKitForm import, then inspect convertkit-react/package.json and the module entry selected by that import. Done means the form loads without the ES-module/CommonJS require error while preserving the library's Next.js compatibility.

Written by the indexing model from the issue text.