- Improve performance of large `ComposedSectionProvider`s 

- Add various convenience functions to `ComposedSectionProvider` - `sectionOffset(for:)` - `firstIndex(of:)` - `contains(_:)` - `insert(_:after:)` - `insert(_:before:)` - Fix delegate calls from `ComposedSectionProvider` sometimes providing the wrong index

Removing by index or child now unsets the delegate as expected 

Segmented providers now animate their changes as expected Fixes a few issues around ensuring updateDelegate is unset when removed and set when inserted for both providers and sections Fixed tests to prove it all works

Adds support for 'move' 

Exposes an array on ManagedObject 

Updates to Swift tools v5.2