unleash_proxy_client_flutter

Fix: add variant data to impression event

Fix: Drop x- prefix from unleash headers

Chore: Sync x-unleash-sdk version scheme with other SDKs

Fix: Skip initial toggles fetch when using updateContext or setContextFields

Chore: Upgrade event_emitter version

Refactor: renamed eventIdGenerator to idGenerator but this API is used only for tests

Feat: experimental support for skip fetch toggles on start

Feat: manual control over updateToggles and sendMetrics

Feat: save network calls when context fields don't change

Fix: payload stringify in bootstrap

Chore: update dependency range on shared_preferences and uuid

Fix: handle parsing errors from storage

Chore: shared_preferences and uuid dependencies update (non-breaking changes)

Feat: appName and environment are automatically send to backend and reported in impression events

Feat: HTTP dependency update. Since it's an important update (env support) it's a feat (major version update) and not chore.

Fix: encoding of custom properties

Fix: handle empty ToggleConfig values

* Feat: variant metrics support

* Feat: added variant payload

Fix set client state before emitting event

Fix updateContext called before start

* Fix pubspec.yaml version

* First official release

* Added examples

Added support for impression events

Initial implementation of the Flutter client