Update composer dependencies; fix CVE-2020-5255
Update composer dependencies; fix CVE-2020-5255

dnmvisser/simplesamlphp,ghalse/simplesamlphp,dnmvisser/simplesamlphp,dnmvisser/simplesamlphp,ghalse/simplesamlphp,simplesamlphp/simplesamlphp,dnmvisser/simplesamlphp,simplesamlphp/simplesamlphp,simplesamlphp/simplesamlphp,ghalse/simplesamlphp,ghalse/simplesamlphp,simplesamlphp/simplesamlphp