updated license year
updated license year

tweakers-dev/swiftmailer,denpamusic/swiftmailer,swiftmailer/swiftmailer,michabbb-backup/swiftmailer,c960657/swiftmailer,voku/swiftmailer,c960657/swiftmailer,voku/swiftmailer,swiftmailer/swiftmailer,Rotzbua/swiftmailer,denpamusic/swiftmailer,jamesggordon/swiftmailer,michabbb-backup/swiftmailer,tweakers-dev/swiftmailer,gencer/swiftmailer,Rotzbua/swiftmailer,gencer/swiftmailer,jamesggordon/swiftmailer