Function join

join(base, ...paths): string
join url path
Parameters
- base: string | URL
  (string | URL): url string or URL
- Rest ...paths: string[]
  (string | URL): relative paths
Returns string
joined raw url
Example
```
import * as url from 'url'

const base = url.parse('https://xxx.com')
url.join(base, '/hello')
```