[animations] Prepare for 1.1.0 (#165)

* Update changelog and pubspec for new release

Author: Shi-Hao Hong

packages/animations/CHANGELOG.md

@@ -1,10 +1,20 @@
-## [1.0.1-dev] - TBD
+# Changelog
 
+All notable changes to this project will be documented in this file.
+
+
+## [1.1.0] - June 2, 2020
+
+* Introduce usage of `DualTransitionBuilder` for all transition widgets, preventing ongoing animations at the start of the transition animation from resetting at the end of the transition animations.
 * Fix `FadeScaleTransition` example's `FloatingActionButton` being accessible
 and tappable when it is supposed to be hidden.
+* `showModal` now defaults to using `FadeScaleTransitionConfiguration` instead of `null`.
+* Added const constructors for `FadeScaleTransitionConfiguration` and `ModalConfiguration`.
 * Add custom fillColor property to `SharedAxisTransition` and `SharedAxisPageTransitionsBuilder`.
 * Fix prefer_const_constructors lint in test and example.
 * Add option `useRootNavigator` to `OpenContainer`.
+* Add `OpenContainer.onClosed`, which is called with a returned value when the container was popped and has returned to the closed state.
+* Fixes a bug with OpenContainer where a crash occurs when the container is dismissed after the container widget itself is removed.
 
 
 ## [1.0.0+5] - February 21, 2020

packages/animations/pubspec.yaml

@@ -1,6 +1,6 @@
 name: animations
 description: Fancy pre-built animations that can easily be integrated into any Flutter application.
-version: 1.0.1-dev
+version: 1.1.0
 homepage: https://github.com/flutter/packages/tree/master/packages/animations
 
 environment: