v1.1.0 of lively_generator

Code generator for the lively reactive Flutter widget package. Changelog excerpt: - Future/ Streamfield support— declare a Futureor Streamfield and the generator produces an Stateof type AsyncValue(starts as AsyncLoading), full lifecycle wiring in initState/dispose, and a build({required data, loading, error})helper method. The loadingand errorparams default to CircularProgressIndicatorand SizedBox.shrink(). Reassigning the field resets to AsyncLoadingand re-subscribes (old stream subscription is cancelled[...]