Add safety check on delta to force view to reload if there is an erro…

…r. Adds new delegate method.

Update CollectionDataAnimationDelegate to include more timing options…

…. Update minimum iOS version to 11.0.

Fix a bug where updating an empty data set could crash on a race cond…

…ition.wq

Added SwiftPM support

• Update item/section calculator to default to .reloadData if the vie…

…w frame isEmpty.

• Fixed a bug where the .reloadData animation wouldn't be respected if the data or delta threshold was crossed.

Update:

• Adds new delegates CollectionDataAnimationDelegate and CollectionSectionDataAnimationDelegate (some functionality from CollectionDataManualReloadDelegate has moved to the new delegates)

• The delegates includes the functions animateAlongsideUpdate and animateAlongsideSectionUpdate to allow you to synchronize animations with update animations.

• Fixes a bug with the data threshold check that was causing some crashes.

Fix an issue with testing against the dataCountAnimationThreshold value.

Update:

  - Will not attempt to perform animations for views not on screen, and will instead perform a reloadData.
  - Adds a new delegate, CollectionDataCalculationNotificationDelegate, to allow monitoring when CollectionData begins and ends calculating the data set. Multiple updates in rapid succession will only trigger a single begin/end pair.

Merge branch 'collate_appends_between_animations'

Update README.md