Empty dir cli not working

[ProtocolNebula]

🐞 Bug report

Description

When emptyDir launched, it fails with an error.

🔬 Minimal Reproduction

Execute:

npx fse-emptyDir anyFolderExistingOrNot

fse-emptydir it's not declared but is available in package.json

💻Your Environment

Node Version:

v12.16.1

fse-cli Version:

"@atao60/fse-cli": "0.0.39",

🔥 Exception or Error

npx fse-emptyDir ./build 
Be gone rapscalian...
(node:49264) UnhandledPromiseRejectionWarning: TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string or an instance of Buffer or URL. Received undefined
    at Object.readdir (fs.js:846:10)
    at go$readdir (/Volumes/Data/swagger-to-angular2/node_modules/@atao60/fse-cli/node_modules/graceful-fs/graceful-fs.js:202:23)
    at Object.readdir (/Volumes/Data/swagger-to-angular2/node_modules/@atao60/fse-cli/node_modules/graceful-fs/graceful-fs.js:184:12)
    at emptyDir (/Volumes/Data/swagger-to-angular2/node_modules/@atao60/fse-cli/node_modules/fs-extra/lib/empty/index.js:11:6)
    at emptyDir (/Volumes/Data/swagger-to-angular2/node_modules/@atao60/fse-cli/node_modules/universalify/index.js:5:57)
    at Object.job (/Volumes/Data/swagger-to-angular2/node_modules/@atao60/fse-cli/src/tasks/emptyDir.ts:33:5)
    at doit (/Volumes/Data/swagger-to-angular2/node_modules/@atao60/fse-cli/src/wrapper.ts:11:12)
    at cli (/Volumes/Data/swagger-to-angular2/node_modules/@atao60/fse-cli/src/cli.ts:6:5)
(node:49264) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:49264) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.