Update READM, CHANGELOG, version

CHANGELOG.md

@@ -4,6 +4,19 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [4.0.0] - 2023-02-13
+### Added
+- `CrossfadeEffect` - cross fades in a new widget
+- `Adapter.direction` - optionally update in only one direction
+
+### Changed
+- major refactor of `Adapter`
+- fix issue with adapters generating errors on disposed `Animate` instances
+- improve smoothing for `Adapter.animated`
+- improve adapter examples
+- changed `ThenEffect` functionality to establish a new baseline time
+- cleaned up tests & added tests for new effects
+
 ## [3.1.0] - 2023-01-30
 ### Added
 - added a few fun examples to the `everything_view`

README.md

@@ -127,7 +127,7 @@ Sequencing with ThenEffect
 ----------------------------------------
 `ThenEffect` is a special convenience "effect" that makes it easier to sequence
 effects. It does this by establishing a new baseline time equal to the previous
-effect's end time and its own optional [delay]. All subsequent effect delays are
+effect's end time and its own optional `delay`. All subsequent effect delays are
 relative to this new baseline.
 
 In the following example, the slide would run 200ms after the fade ended.

example/pubspec.lock

@@ -61,7 +61,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "3.1.0"
+    version: "4.0.0"
   flutter_lints:
     dependency: "direct dev"
     description:

pubspec.yaml

@@ -1,6 +1,6 @@
 name: flutter_animate
 description: Add beautiful animated effects & builders in Flutter, via an easy, customizable, unified API.
-version: 3.1.0
+version: 4.0.0
 repository: https://github.com/gskinner/flutter_animate
 issue_tracker: https://github.com/gskinner/flutter_animate/issues