updated VENDORS for 3.1.0
updated VENDORS for 3.1.0

black-project/black-standard,egeloen/symfony-standard,apnet/symfony-standard-edition,gencer/symfony-standard,simonjcarr/symfony_rest,symfony-cmf/standard-edition,proteichik/testApp,black-project/black-standard,vincentaubert/symfony-standard,GulDmitry/music-diff,egeloen/symfony-standard,symfony/symfony-standard,uttam-vi/pardawala,the-software-factory/superhero-api,debruyne0/symfony,fabpot/symfony-standard,stof/symfony-standard,debruyne0/symfony,stof/symfony-standard,formapro-forks/api-basic,proteichik/testApp,formapro-forks/api-basic,lyrixx/symfony-standard,simonjcarr/symfony_rest,kmelia/fresh-symfony,vincentaubert/symfony-standard,Spea/symfony-standard,ovelasquez/ussi,gencer/symfony-standard,apnet/symfony-standard-edition,the-software-factory/superhero-api,ovelasquez/ussi,ovelasquez/ussi,uttam-vi/pardawala,fabpot/symfony-standard,Spea/symfony-standard,kmelia/fresh-symfony,lyrixx/symfony-standard,uttam-vi/pardawala,jakzal/symfony-standard,Tobion/symfony-standard,symfony-cmf/standard-edition,GulDmitry/music-diff,GulDmitry/music-diff,kmelia/fresh-symfony,GulDmitry/music-diff,symfony/symfony-standard,jakzal/symfony-standard,apnet/symfony-standard-edition,Tobion/symfony-standard