Updating support URLs in composer.json

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@3404 44740490-163a-0410-bde0-09ae8108e29a
Automatically updating composer.lock.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@3405 44740490-163a-0410-bde0-09ae8108e29a