add link to redux-persist-pouchdb (#1055)

Fixes #222

Author: yanick

README.md

@@ -246,6 +246,7 @@ const persistConfig = {
 - **[redux-persist-weapp-storage](https://github.com/cuijiemmx/redux-casa/tree/master/packages/redux-persist-weapp-storage)** Storage engine for wechat mini program, also compatible with wepy
 - **[redux-persist-webextension-storage](https://github.com/ssorallen/redux-persist-webextension-storage)** Storage engine for browser (Chrome, Firefox) web extension storage
 - **[@bankify/redux-persist-realm](https://github.com/bankifyio/redux-persist-realm)** Storage engine for Realm database, you will need to install Realm first
+- **[redux-persist-pouchdb](https://github.com/yanick/redux-persist-pouchdb)** Storage engine for PouchDB.
 - **custom** any conforming storage api implementing the following methods: `setItem` `getItem` `removeItem`. (**NB**: These methods must support promises)
 
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