Usage: rebar set-file-impact [--none [NONE_REASON]] [ticket_id] [<json_array>]

Record file impact for a ticket (JSON array of {path,reason} objects).

positional arguments:
  ticket_id             the ticket to annotate
  <json_array>          JSON array of {path,reason} objects

options:
  --none [NONE_REASON]  record 'no file impact' with a reason

No-impact form: rebar set-file-impact <ticket_id> --none "<reason>".
