Command failed
```
⠼ Bumping package.json version and creating git tag
Error: Command failed: npm version v1.2 -m "Publish %s release :rocket:"
npm ERR! npm version [<newversion> | major | minor | patch | premajor | preminor | prepatch | prerelease | from-git]
npm ERR! (run in package dir)
npm ERR! 'npm -v' or 'npm --version' to print npm version (4.2.0)
npm ERR! 'npm view <pkg> version' to view a package's published version
npm ERR! 'npm ls' to inspect current package/dependency versions
```
when I use commond `skpm publish v1.2` it turn out this error
