docs: update docs for createAsyncStoragePersistor and createWebStoragePersistor

Author: Ben Grynhaus

docs/src/pages/plugins/createAsyncStoragePersistor.md

@@ -60,6 +60,10 @@ interface CreateAsyncStoragePersistorOptions {
   /** To avoid localstorage spamming,
    * pass a time in ms to throttle saving the cache to disk */
   throttleTime?: number
+  /** How to serialize the data to storage */
+  serialize?: (client: PersistedClient) => string
+  /** How to deserialize the data from storage */
+  deserialize?: (cachedString: string) => PersistedClient
 }
 
 interface AsyncStorage {
@@ -75,5 +79,7 @@ The default options are:
 {
   key = `REACT_QUERY_OFFLINE_CACHE`,
   throttleTime = 1000,
+  serialize = JSON.stringify,
+  deserialize = JSON.parse,
 }
 ```

docs/src/pages/plugins/createWebStoragePersistor.md

@@ -57,6 +57,10 @@ interface CreateWebStoragePersistorOptions {
   /** To avoid spamming,
    * pass a time in ms to throttle saving the cache to disk */
   throttleTime?: number
+  /** How to serialize the data to storage */
+  serialize?: (client: PersistedClient) => string
+  /** How to deserialize the data from storage */
+  deserialize?: (cachedString: string) => PersistedClient
 }
 ```
 
@@ -66,5 +70,7 @@ The default options are:
 {
   key = `REACT_QUERY_OFFLINE_CACHE`,
   throttleTime = 1000,
+  serialize = JSON.stringify,
+  deserialize = JSON.parse,
 }
 ```