Exclude unnecessary files

[Kikobeats]

Hello,

Since all the main browser/Node.js are pointing to a file inside dist folder, I think that the rest of files inside files field can be removed in order to reduce the package size.

[remusao]

Hey,

Thanks a lot for opening this PR. Originally I decided to leave the original source code in the package so that project could import the TypeScript files directly. But I guess that does not happen and the type definitions from dist are enough. Seems fine to remove. Did you maybe measure the size difference with this change?

[remusao]

Answering my own question.

before:

npm notice package size:  568.6 kB                                
npm notice unpacked size: 1.6 MB
npm notice total files:   47  

after:

npm notice package size:  484.9 kB                                
npm notice unpacked size: 1.4 MB                                  
npm notice total files:   32 

To save even more maybe it would make sense as a next step to publish tldts and tldts-experimental as two separate packages. I see you are using lerna extensively in your projects, I guess it could be useful for this purpose as well.

Merging this as it provides a significant gain already.

Thanks again!

[remusao]

Released v5.2.0 (will be available on npm shortly).

[Kikobeats]

Yes, in addition, CLI could be a separated package, like tldts- cli