A flag to define whether app is in development mode or not. An enabled
Development mode sets the SDK to prioritize SDK tasks and display some
error messages in your app to assist in setting up Nami and in-app
purchases.
Optional preferable NamiLogLevel to set within SDK to get appropriate
logging information. Make sure to either not set this param in release
build, or set to NamiLogLevel.error if you would like Nami error logs
to be shown in your release/production app build. Default is set
to NamiLogLevel.warn