v1.0.0-RC21-2

This release contains bug fixes related to the fiber supervision model that are binary compatible with RC21 and RC21-1. Upgrading is recommended for all users.

Notable changes:

• Implement ZTransducer.foldUntil using ZTransducer.fold (#3885) (by @iravid)
• Add someOrElseM method to ZIO, ZManaged and ZSTM (#3830) (by @vladimirkl)
• Return most specific collection type (#3855) (by @adamgfraser)
• Explore only previously matched branch when visiting partially satisfied OR expectation (#3904) (by @ioleo)
• Add NonEmptyChunk.unit (#3917) (by @mijicd)
• Add ZIO.filterPar (#3915) (by @cipriansofronia)
• Handle Possibility that Parent Scope is Closed (#3912) (by @adamgfraser)
• Add initial Gitpod support. (#3916) (by @mgenereu)
• Set status to interrupting before closing scope (#3883) (by @mikearnaldi)
• Fix OOM at bufferSliding (#3892) (by @narma)