refactor(bloc_helper): general code update

packages/wyatt_bloc_helper/lib/src/bloc_base/bloc_base_consumer_screen.dart

@@ -41,12 +41,10 @@ abstract class BlocBaseConsumerScreen<B extends BlocBase<S>, S extends Object>
   void onListen(BuildContext context, S state) {}
 
   @override
-  Widget build(BuildContext context) {
-    return BlocConsumer<B, S>(
-      listenWhen: shouldListenWhen,
-      listener: onListen,
-      buildWhen: shouldBuildWhen,
-      builder: onBuild,
-    );
-  }
+  Widget build(BuildContext context) => BlocConsumer<B, S>(
+        listenWhen: shouldListenWhen,
+        listener: onListen,
+        buildWhen: shouldBuildWhen,
+        builder: onBuild,
+      );
 }

packages/wyatt_bloc_helper/lib/src/bloc_base/bloc_base_provider_screen.dart

@@ -28,10 +28,8 @@ abstract class BlocBaseProviderScreen<B extends BlocBase<S>, S extends Object>
   Widget buildChild(BuildContext context);
 
   @override
-  Widget build(BuildContext context) {
-    return BlocProvider<B>(
-      create: (_) => create(context),
-      child: Builder(builder: buildChild),
-    );
-  }
+  Widget build(BuildContext context) => BlocProvider<B>(
+        create: (_) => create(context),
+        child: Builder(builder: buildChild),
+      );
 }

packages/wyatt_bloc_helper/lib/src/bloc_base/bloc_base_screen.dart

@@ -26,10 +26,8 @@ abstract class BlocBaseScreen<B extends BlocBase<S>, S extends Object>
   B create(BuildContext context);
 
   @override
-  Widget build(BuildContext context) {
-    return BlocProvider<B>(
-      create: (_) => create(context),
-      child: super.build(context),
-    );
-  }
+  Widget build(BuildContext context) => BlocProvider<B>(
+        create: (_) => create(context),
+        child: super.build(context),
+      );
 }