Add generic event driven options callback.
Fix the copyright header.
Clean use statements.
Add support for event factories, in the CreateOptionsEventCallbackFactory::createCallback() method.
Dispatch cron.[monthly|weekly|daily|hourly|minutely] events.
Extract the cron event into its own micro project contao-community-alliance/events-cron.
Extract the create-options event into its own micro project contao-community-alliance/events-create-options.
Add homepage
Add parameter typing.
Fix subscriber factory support.
Bump Contao maximum core version to 3.3.
Change composer-installer to composer-plugin.
Require contao-community-alliance/composer-plugin ~2.0 now.
Require symfony/event-dispatcher ~2.3 now.
Merge branch 'release/1.2'