fixed typo in composer.json
fixed typo in composer.json

UofSC/php-shared-functions,peterkokot/swiftmailer,fvosberg/swiftmailer,UofSC/php-shared-functions,tweakers-dev/swiftmailer,voku/swiftmailer,jamesggordon/swiftmailer,Dubz/swiftmailer,Pardot/swiftmailer,michabbb-backup/swiftmailer,deguif/swiftmailer,swiftmailer/swiftmailer,gburyakovsky/swiftmailer,Pardot/swiftmailer,gencer/swiftmailer,UofSC/php-shared-functions,jamesggordon/swiftmailer,peterkokot/swiftmailer,handautsav/swiftmailer,zghosts/swiftmailer,handautsav/swiftmailer,denpamusic/swiftmailer,gburyakovsky/swiftmailer,Rotzbua/swiftmailer,Pardot/swiftmailer,robertklein/swiftmailer,gencer/swiftmailer,kuslahne/swiftmailer,papagel/swiftmailer,zghosts/swiftmailer,peterkokot/swiftmailer,Pardot/swiftmailer,denpamusic/swiftmailer,papagel/swiftmailer,kuslahne/swiftmailer,c960657/swiftmailer,Chhunlong/swiftmailer,robertklein/swiftmailer,Rotzbua/swiftmailer,Dubz/swiftmailer,fvosberg/swiftmailer,tweakers-dev/swiftmailer,michabbb-backup/swiftmailer,deguif/swiftmailer,voku/swiftmailer,Chhunlong/swiftmailer,swiftmailer/swiftmailer,c960657/swiftmailer