more codeclimate fixes

lib/emitter/docs/examples/AssignmentGraded.json

lib/emitter/src/Events/AssignmentGraded.php

lib/emitter/src/Events/AssignmentSubmitted.php

lib/emitter/src/Events/AttemptCompleted.php

lib/emitter/src/Events/AttemptStarted.php

lib/emitter/src/Events/Attended.php

lib/emitter/src/Events/CourseCompleted.php

lib/emitter/src/Events/EnrolmentCreated.php

lib/emitter/src/Events/Event.php

lib/emitter/src/Events/EventEnrol.php

lib/emitter/src/Events/EventUnenrol.php

lib/emitter/src/Events/QuestionAnswered.php

lib/emitter/src/Events/ScormEvent.php

lib/emitter/src/Events/ScormLaunched.php

lib/emitter/src/Events/ScormScoreRawSubmitted.php

lib/emitter/src/Events/ScormStatusSubmitted.php

lib/emitter/src/Events/UserLoggedin.php

lib/emitter/src/Events/UserLoggedout.php

lib/emitter/src/Events/UserRegistered.php

lib/emitter/src/Events/Viewed.php