Bump version to 2.0.0 (airbnb#288)

Add missing dates to changelog releases

Bumo version to 1.15.0 (airbnb#195)

Support animated setContent updates (airbnb#179)

* Support animated setContent updates

* Fix tests

Use displayScale instead of UIScreen APIs (airbnb#174)

Add scrollViewShouldScrollToTop support (airbnb#172)

Fix layout after layout metric is changed (airbnb#167)

* Fix layout have a layout metric is changed

* Fix CI

Remove unnecessary layout assert (airbnb#162)

Fix scroll to day bounds check (airbnb#161)

FIx build (airbnb#160)