Improve readme and fix changelog

Signed-off-by: Mateus Felipe C. C. Pinto <[email protected]>

Author: mateusfccp

README.md

@@ -7,7 +7,6 @@
 
  * Provide a simple, single function to get update availability for your Android or iOS app.
  * Version checking based on published app version.
- * Foldable structure so that you have compile-time exhaustive check.
 
  ## Documentation
 

update_available/CHANGELOG.md

@@ -3,9 +3,6 @@
 - Support for Android namespace
 - Update to Android `compileSdkVersion 34`
 - Upgrade `flutter_lints` to `^3.0.2`
-
-## 3.0.2
-
 - Support for `package_info_plus: '>=4.0.2 <9.0.0'` on iOS
 
 ## 3.0.1

update_available/README.md

@@ -7,8 +7,6 @@
 
  * Provide a simple, single function to get update availability for your Android or iOS app.
  * Version checking based on published app version.
- * ~~Foldable structure so that you have compile-time exhaustive check.~~
-   * Since version 3.0 (with Dart 3.0), exhaustive check is done by using `switch`, as `Availability` is now a `sealed class`.
 
  ## Getting started