Return code should be non-zero on error

[vincentbernat]

Hey!

When running diff2html, I would expect that a fatal error would return a status code different of 0. Currently, the error is printed but the status code says 0.

[rtfpessoa]

I guess I never worked on that part. Eventually I should set process.exitCode

[rtfpessoa]

Check https://github.com/rtfpessoa/diff2html-cli#exit-status-codes for the codes and you can also start using it in version 5.1.0.

[vincentbernat]

Thanks!