fix(Store): Fix typing for feature to accept InjectionToken (#375)

Author: Szpadel

modules/store/src/store_module.ts

@@ -144,17 +144,17 @@ export class StoreModule {
 
   static forFeature<T, V extends Action = Action>(
     featureName: string,
-    reducers: ActionReducerMap<T, V>,
+    reducers: ActionReducerMap<T, V> | InjectionToken<ActionReducerMap<T, V>>,
     config?: StoreConfig<T, V>
   ): ModuleWithProviders;
   static forFeature<T, V extends Action = Action>(
     featureName: string,
-    reducer: ActionReducer<T, V>,
+    reducer: ActionReducer<T, V>| InjectionToken<ActionReducer<T, V>>,
     config?: StoreConfig<T, V>
   ): ModuleWithProviders;
   static forFeature(
     featureName: string,
-    reducers: ActionReducerMap<any, any> | ActionReducer<any, any>,
+    reducers: ActionReducerMap<any, any> | InjectionToken<ActionReducerMap<any, any>> | ActionReducer<any, any> | InjectionToken<ActionReducer<any, any>>,
     config: StoreConfig<any, any> = {}
   ): ModuleWithProviders {
     return {