Add Error Handler function documentation

README.md

@@ -239,5 +239,6 @@ API reference
             - **persistThrottle** - how much time should the persistence be throttled in milliseconds *(default: `100`)*
             - **persistDebounce** *(optional)* - how much time should the persistence be debounced by in milliseconds. If provided, persistence will not be throttled, and the `persistThrottle` option will be ignored. The debounce is a simple trailing-edge-only debounce.
             - **persistWholeStore** - a boolean which specifies if the whole store should be persisted at once. Generally only use this if you're using your own storage driver which has gigabytes of storage limits. Don't use this when using window.localStorage, window.sessionStorage or AsyncStorage as their limits are quite small. When using this option, key won't be passed to `serialize` nor `unserialize` functions - *(default: `false`)*;
+            - **errorHandler** - an error handler hook function which is gets a first argument of type `PersistError` or `RehydrateError` - these include a full error stack trace pointing to the source of the error. If this option isn't specified the default behaviour is to log the error using console.warn() - *(default: `console.warn`)*;
             - **initActionType** (optional) - a string which allows you to postpone the initialization of `Redux Remember` until an action with this type is dispatched to the store. This is used in special cases whenever you want to do something before state gets rehydrated and persisted automatically (e.g. preload your state from SSR). **NOTE: With this option enabled Redux Remember will be completely disabled until `dispatch({ type: YOUR_INIT_ACTION_TYPE_STRING })` is called**;
     - Returns - an enhancer to be used with Redux