fix(core): CHECKOUT-2450 Mark options as optional

Author: davidchin

src/create-data-store.spec.ts

@@ -0,0 +1,10 @@
+import createDataStore from './create-data-store';
+import DataStore from './data-store';
+
+describe('createDataStore()', () => {
+    it('creates data store', () => {
+        const store = createDataStore((state) => state);
+
+        expect(store).toBeInstanceOf(DataStore);
+    });
+});

src/create-data-store.ts

@@ -5,8 +5,8 @@ import Reducer from './reducer';
 
 export default function createDataStore<TState, TAction extends Action, TTransformedState = TState>(
     reducer: Reducer<Partial<TState>, TAction> | ReducerMap<Partial<TState>, TAction>,
-    initialState: Partial<TState>,
-    options: DataStoreOptions<TState, TAction, TTransformedState>
+    initialState?: Partial<TState>,
+    options?: Partial<DataStoreOptions<TState, TAction, TTransformedState>>
 ): DataStore<TState, TAction, TTransformedState> {
     if (typeof reducer === 'function') {
         return new DataStore(reducer, initialState, options);