crunchyroll-rs v0.12.0

• Add Episode::versions and Season::versions fields manually if they're delivered as null by Crunchyroll (#39)
• Add triggering of the middleware when doing the initial auth request
• Add missing api fields
• Move all content of StreamData to the newly created MediaStream and convert StreamData to an enum containing audio streams, video streams and subtitle
• Remove all comment and review related structs and methods
• Remove all "maybe_without_drm" methods as everything is now drm
• Change CrunchyrollBuilder::device_identifier to take the newly introduced DeviceIdentifier as argument