fix(persistReducer): Ensure nested reducers can handle PERSIST too. Fixes rt2zz#940

Author: jscinoz

src/persistReducer.js

@@ -106,7 +106,15 @@ export default function persistReducer<State: Object, Action: Object>(
       if (!_persistoid) _persistoid = createPersistoid(config)
 
       // @NOTE PERSIST can be called multiple times, noop after the first
-      if (_persist) return state
+      if (_persist) {
+        // We still need to call the base reducer because there might be nested
+        // uses of persistReducer which need to be aware of the PERSIST action
+        return {
+          ...baseReducer(restState, action),
+          _persist,
+        };
+      }
+
       if (
         typeof action.rehydrate !== 'function' ||
         typeof action.register !== 'function'