Specifying the --plugin flag without a value causes an exception

FYI: when I failed to add a path paramedic threw a 'type error':

cordova-paramedic --platform android --plugin
cordova-paramedic: creating temp project at /var/folders/p4/m50wzcnx3_5grsq_d3z5kq5w0000gn/T/tmp-21300Vfzeii04OHd0
cordova-paramedic: installing true
path.js:7
throw new TypeError('Path must be a string. Received ' + inspect(path));
^

TypeError: Path must be a string. Received true
at assertPath (path.js:7:11)