chore: update CodeIgniter to latest dev version after 4.1.6

app/Config/CURLRequest.php

app/Config/Cache.php

app/Config/Events.php

app/Config/Feature.php

app/Config/Filters.php

app/Config/Generators.php

app/Config/Mimes.php

app/Config/Publisher.php

app/Config/Security.php

app/Config/Toolbar.php

app/Controllers/EpisodeCommentController.php

app/Controllers/EpisodeController.php

app/Controllers/PodcastController.php

app/Controllers/PostController.php

app/Entities/EpisodeComment.php

app/Entities/Podcast.php

app/Helpers/auth_helper.php

app/Models/EpisodeCommentModel.php

app/Models/LikeModel.php

app/Views/errors/html/error_exception.php