An error occurred creating the expectation "Syntax error" on Respond with large Body

[enduro44]

Hi @mcustiel

When sending request with large size body
$I->expectARequestToRemoteServiceWithAResponse( Phiremock::on($this->requestProxy())->then( Respond::withStatusCode(200)->andBody($largeBody) ) );

I got this error :
An error occurred creating the expectation: array ( 0 => 'Syntax error', ){"result" : "ERROR", "details" : ["Syntax error"]} vendor\mcustiel\phiremock-client\src\Phiremock.php:312 vendor\mcustiel\phiremock-client\src\Phiremock.php:114 vendor\mcustiel\phiremock-client\src\Phiremock.php:99

It turns out that is caused by new property MAXIMUM_BUFFER_SIZE in react/http/src/Server.php
reactphp/http@49b4799

To resolve this we need to override MAXIMUM_BUFFER_SIZE by using RequestBodyBufferMiddleware().

I've resoled and will soon submit my PR for this