bin/heroics-generate returns success status code even when it fails to generate a client

[schneems]

I see that the command still reports as successful even when it's not:

$ bin/heroics-generate -h "Content-Type: application/json"
Usage: heroics-generate module_name schema_filepath url
       heroics-generate configuration-file-path.rb
# Params only allowed when using the first form:
    -h, --help                       Display this screen
    -H, --header [HEADER]            Include header with all requests
    -c, --cache-dir [PATH]           Content cache directory (~ is automatically expanded)
$ echo $?
0

This exit code should be non-zero.