support connecting to neo4j server with http proxy

[xumng]

• Laravel Version: 7.0.0
• PHP Version: 7.4.9
• NeoEloquent Version: 7.0

Description:

When i connect my neo4j community 3.5.28 in laravel service, it throw an exception as follow:
Vinelab\NeoEloquent\QueryException
Can't open connection to http://localhost:7474/db/data/

I found that Curl.php's function makeRequest haven't set the proxy options.

Steps To Reproduce:

1. modify Curl.php's function makeRequest and set proxy options.

$options = array(
CURLOPT_URL => $url,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_HEADER => true,
CURLOPT_HTTPHEADER => array(
'Accept: application/json;stream=true',
'Content-type: application/json',
'User-Agent: '.Version::userAgent(),
'X-Stream: true'
),
CURLOPT_CUSTOMREQUEST => self::GET,
CURLOPT_POST => false,
CURLOPT_POSTFIELDS => null,
CURLOPT_IPRESOLVE => CURL_IPRESOLVE_V4,
CURLOPT_PROXYTYPE => CURLPROXY_HTTP, //when neo4j server config http proxy, please set this. reference https://www.php.net/curl_setopt
CURLOPT_PROXY => "", //"http://proxy.example.com:80"
);

Expected result

connected to neo4j server ok.

Actual result

Vinelab\NeoEloquent\QueryException
Can't open connection to http://localhost:7474/db/data/