pub package style: flutter lints

A common platform interface for the nevis_mobile_authentication_sdk plugin.

This interface allows platform-specific implementations of the nevis_mobile_authentication_sdk plugin, as well as the plugin itself, to ensure they are supporting the same interface.


To implement a new platform-specific implementation of nevis_mobile_authentication_sdk, extend NevisMobileAuthenticationSdkPlatform with an implementation that performs the platform-specific behavior, and when you register your plugin, set the default NevisMobileAuthenticationSdkPlatform by calling NevisMobileAuthenticationSdkPlatform.instance = MyPlatformNevisMobileAuthenticationSdkPlatform().