fix: Bug under windows on post creation

src/cli/core/utils/slug.js

@@ -5,7 +5,7 @@ import {config} from '../../'
 
 export function clean(str) {
   if (typeof str === 'undefined' || str === null) return null
-  str = str.split(path.sep)
+  str = str.split('/')
   str[str.length - 1] = slugify(decodeURIComponent(str[str.length - 1]))
   return str.join('/')
 }