Add an option to write a final newline

[remss]

The final newline to the files produced should be optional.

jsonfile.writeFile(file, obj, { finalEOL: false  })

[RyanZim]

What is the usecase for not wanting a final EOL?

[remss]

Projects may have a .editorconfig with insert_final_newline = false, and nodejs script that generates files, currently using fs.writeFile(path, JSON.stringify(data, null, 4)).
So I cannot use jsonfile.writeFile(path, data, {space: 4}) now because it will add a final EOL that is not wanted.

An other reason is a library produce json files with no final EOL. When you start using node-jsonfile module internally, you don't want to change the behavior or your API.

[RyanZim]

I don't really get the point of this since final EOLs are a strong Unix convention; but I would consider it if someone did a PR.

[asingh04]

@RyanZim i would like to pick this up

[RyanZim]

@asingh04 go for it.

[asingh04]

The PR for this feature:
#137