chore: revert breaking setProvider

src/OpenFeature/Api.cs

@@ -44,7 +44,7 @@ private Api() { }
         [Obsolete("Will be removed in later versions; use SetProviderAsync, which can be awaited")]
         public void SetProvider(FeatureProvider featureProvider)
         {
-            this.EventExecutor.RegisterDefaultFeatureProvider(featureProvider);
+            this._eventExecutor.RegisterDefaultFeatureProvider(featureProvider);
             _ = this._repository.SetProvider(featureProvider, this.GetContext());
         }
 
@@ -68,7 +68,7 @@ public async Task SetProviderAsync(FeatureProvider featureProvider)
         [Obsolete("Will be removed in later versions; use SetProviderAsync, which can be awaited")]
         public void SetProvider(string clientName, FeatureProvider featureProvider)
         {
-            this.EventExecutor.RegisterClientFeatureProvider(clientName, featureProvider);
+            this._eventExecutor.RegisterClientFeatureProvider(clientName, featureProvider);
             _ = this._repository.SetProvider(clientName, featureProvider, this.GetContext());
         }
 

test/OpenFeature.Tests/OpenFeatureEventTests.cs

@@ -137,7 +137,7 @@ public async Task API_Level_Event_Handlers_Should_Be_Informed_About_Ready_State_
         [Specification("5.2.4", "The `handler function` MUST accept a `event details` parameter.")]
         [Specification("5.3.1", "If the provider's `initialize` function terminates normally, `PROVIDER_READY` handlers MUST run.")]
         [Specification("5.3.3", "Handlers attached after the provider is already in the associated state, MUST run immediately.")]
-        public void API_Level_Event_Handlers_Should_Be_Informed_About_Ready_State_After_Registering_Provider_Ready_Sync()
+        public async void API_Level_Event_Handlers_Should_Be_Informed_About_Ready_State_After_Registering_Provider_Ready_Sync()
         {
             var eventHandler = Substitute.For<EventHandlerDelegate>();