Replace deprecated bfj

[TrySound]

Issue description

Related pull request #129

Looks like all major libraries for streaming json are archived and not gonna be maintained anymore.

• https://github.com/dominictarr/JSONStream
• https://gitlab.com/philbooth/bfj

Here're possible alternatives

• https://github.com/Faleij/json-stream-stringify
• https://github.com/contra/JSONStream (a fork)
• https://github.com/uhop/stream-json

Let's discuss before making changes. Maybe it's not necessary with webpack 5.

[th0r]

Maybe it's not necessary with webpack 5.

Why? Does it introduce some new way to stringify and write huge stats object to disk?

[TrySound]

Maybe new stats is not that huge to require this. I'm really not aware about this, just guessing.

[th0r]

Fixed in #390