upgrade version 1.0.0

pull request:
#40

upgrade version to 0.2.3

## 0.2.1

* Adding getDisplays, getNameByDisplayId, and getNameByIndex for iOS
* Allowing the user to select the screen index and routerName for show presentation for iOS
* Changing the example UI to allow user input and showing the result on the UI

Supported IOS platform

supported null safety

* update documents

* Replace PresentationDisplay to SecondaryDisplay

Create SECURITY.md

fix static analysis

increase version lib to 0.1.2

remove DisplayManager Widget