Drive S3 updated, GCS added

Drive S3 custom CDN prefix

@adonisjs/[email protected] Added support for custom CDN URL prefix and changed how user settings are applied.

Previously default settings were used, when user provided no options. Now user settings are merged to default ones

Drive supports GCS

@adonisjs/[email protected] initial release means that Google Cloud Storage can now be used as @adonisjs/drive storage driver