command 'skpm create' failed
the command `skpm create dir` failed with status 1.

below is my env

* node version 8.6.0
* npm version 5.6.0
* yarn version v1.3.2

I tried to log the error by modifying the code in usr/local/bin and got this err:
```
{
  Error: Exited with status 1
    at closeArgsToError (/usr/local/lib/node_modules/skpm/node_modules/cross-spawn-promise/lib/index.js:20:16)
    at ChildProcess.<anonymous> (/usr/local/lib/node_modules/skpm/node_modules/cross-spawn-promise/lib/index.js:76:19)
    at Object.onceWrapper (events.js:318:30)
    at emitTwo (events.js:125:13)
    at ChildProcess.emit (events.js:213:7)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:200:12)
  exitStatus: 1,
  stdout: null,
  stderr: null 
}


```