[HttpClient] Add Klaxoon as a backer to the README
[HttpClient] Add Klaxoon as a backer to the README

paradajozsef/symfony,symfony/symfony,tucksaun/symfony,Tobion/symfony,sgehrig/symfony,hhamon/symfony,xabbuh/symfony,derrabus/symfony,ogizanagi/symfony,hhamon/symfony,paradajozsef/symfony,nicolas-grekas/symfony,HeahDude/symfony,mpdude/symfony,stof/symfony,hhamon/symfony,curry684/symfony,nicolas-grekas/symfony,curry684/symfony,ro0NL/symfony,d-ph/symfony,phramz/symfony,sgehrig/symfony,symfony/symfony,ogizanagi/symfony,tucksaun/symfony,ro0NL/symfony,Tobion/symfony,phramz/symfony,sgehrig/symfony,derrabus/symfony,mpdude/symfony,damienalexandre/symfony,tucksaun/symfony,curry684/symfony,phramz/symfony,HeahDude/symfony,paradajozsef/symfony,nicolas-grekas/symfony,ogizanagi/symfony,stof/symfony,symfony/symfony,HeahDude/symfony,d-ph/symfony,sgehrig/symfony,xabbuh/symfony,stof/symfony,hhamon/symfony,derrabus/symfony,HeahDude/symfony,derrabus/symfony,ogizanagi/symfony,phramz/symfony,nicolas-grekas/symfony,paradajozsef/symfony,xabbuh/symfony,Tobion/symfony,damienalexandre/symfony,xabbuh/symfony,symfony/symfony,tucksaun/symfony,ro0NL/symfony,d-ph/symfony,curry684/symfony,d-ph/symfony,mpdude/symfony,mpdude/symfony,ro0NL/symfony,Tobion/symfony,stof/symfony,damienalexandre/symfony,damienalexandre/symfony