[Feature Request] Different exit code for fatal error

[ybiquitous]

Hello,

I'm in trouble because I cannot distinguish a fatal error from a rule violation by the exit code. 😰

querly/lib/querly/cli/test.rb

Lines 36 to 41 in 6bfde87

	rescue => exn
	stderr.puts Rainbow("Fatal error:").red
	stderr.puts exn.inspect
	stderr.puts exn.backtrace.map {|x| " " + x }.join("\n")
	1

querly/lib/querly/cli.rb

Lines 59 to 61 in 6bfde87

	rescue => exn
	formatter.fatal_error exn
	exit 1

Without parsing the output (STDOUT and STDERR), is there a way to distinguish them?
If no way, perhaps this may be a breaking change, would it be a good idea to add a new exit code (e.g. 1) for a fatal error?

I would be happy if you could consider this idea.
Thank you.