feat: Add option --report-json

[tyankatsu0105]

Description

When runnpm run bundlesize --report-json, output file bundlesize-report.json in working directory.

Motivation and Context

We can edit data made from bundlesize

Screenshots (if appropriate):

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

• My code follows the code style of this project.
• If my change requires a change to the documentation I have updated the documentation accordingly.
  • I’m thinking about whether to add this option for README.md.
• I have read the CONTRIBUTING document.
• I created an issue for the Pull Request Closes #322

[SilentImp]

Any updates? I need this feature :)

[followdarko]

i am also need it

[tyankatsu0105]

@siddharthkp Would you mind reviewing this PR?

[shwarcu]

@kevindantas @siddharthkp is there any chance having this topic moved forward?

[siddharthkp]

The chances are higher if this is ported over to https://github.com/siddharthkp/bundlesize2

[Liubasara]

Any news? I think this feature is great

[siddharthkp]

Any news? I think this feature is great

Nope, I don't think I'll merge this to this repository, happy to accept a PR for https://github.com/siddharthkp/bundlesize2 though