v1.4.0

IMPROVEMENTS

• Update CORS logic to prevent duplicated headers. If mock was running with a
  base api set which includes cors headers, then mock would respond with
  duplicated cors headers. Now mock overwrites any cors headers which were set
  by the Base API if executed with the --cors flag.

• Add forward command enabling Response Shell-Scripts to "forward" the
  current request to a Base API, and then modify the Base API's Response if
  desired. Check the "Base-API" section in the manual for more details.