Fix the error of page break which passing array include $pageName key.

Fix the error of page break which passing an array include $pageName query to appends() method.

Steps to Reproduce：
1. pageName:'page'
3. view: ``` {{$items->appends(Request::all())->links();}} ```,the current url is: ```'http://host/query?page=1&something=hello'```
4. all links of paginator are 'http://host/query?page=1&something=hello'.