Release v3.14.0

Added

• cratis run accepts a single Screenplay (.play) file as well as a folder. Only that file is mounted, read-only, and handed to the Stage; the folder it sits in is not mounted (#128)

Changed

• cratis run mounts a Screenplay folder read-only (#128)
• cratis run finds .play files in a folder in any casing on every platform (#128)
• cratis run rejects a missing path, a file without the .play extension, or a path containing a colon before Docker is started (#128)