Bug: Types for CJS are not exported correctly

[zirkelc]

Describe the bug
The TS types for CJS are not exported correctly, which causes the "module": "node16" and "moduleResolution": "node16" to report errors. See this repo for reproduction: https://github.com/zirkelc/happy-dom-types-node16

Screenshots
If applicable, add screenshots to help explain your problem.

Additional context
I have experienced this issue multiple times with different packages. For example, LangChain had the same problem which I described here: langchain-ai/langchainjs#4060 (comment)

When you export CJS files as index.cjs, then you need to export the corresponding type declarations as index.d.cts and not index.d.ts. Here is a short video that demonstrates the fix:

2024-05-08_09-04-41.mp4

As you can see, all you need to do is to change the file extension.

Last but not least: thank you for work on this package!