* Change: example app name

* Update: environment sdk and flutter
* Migrate: to android v2 embedding
* Add: flutter lints and analysis options
* Update: LICENSE

remove: author tag and upper bound of flutter constraint from pubspec…

….yaml

remove: author tag and upper bound of flutter constraint from pubspec…

….yaml

migrate: to null safety

Add: `padding` property to `Frost` widget.

Add: `Frost.text` which takes string as input.
Add: `Frost.icon` which takes iconData as input.