ERR_CHILD_PROCESS_STDIO_MAXBUFFER when running audit -g -s

[oatkiller]

Hi all.
Thanks for maintaining this project. I am getting an error when running the audit command. I think it is caused by https://github.com/snyk/github-codeowners/blob/main/src/lib/file/readGit.ts#L5 which reads the entire git ls-files

Changing that line to:

const { stdout } = await exec('git ls-files', { cwd: dir, maxBuffer: 1024 * 1024 * 1024 });

Fixes the error, although the command is slower. For context, here is the beginning of the output:

--- Counts ---
Total: 62265 files (11911663 lines) 100%
Loved: 57515 files (7899241 lines) 66.32%
Unloved: 4750 files (4012422 lines 33.68%

I think this command could be optimized by listening to events on child processes and processing the data as a stream, perhaps using iterators or event listeners. I would be willing to take a shot at making this change in a PR, but I would like to gauge interest in such a change. Thanks for taking the time to look at my issue.