(refactor/deps): extract out mst-persist into its own lib

- made a bunch of changes, but works in mostly the same fashion
  - mostly additions and superificial changes to the underlying code
    - e.g. whitelists + blacklists (and as arrays, like redux-persist),
      persist returns promise instead of calling `afterHydration`, etc

- wanted lib per pinqy520/mobx-persist#37 ,
  but only gists and examples around
  - it's a tiny wrapper library for now, but still faster than writing
    by yourself

- installing via GH since empty NPM package is owned by someone else rn
  - pinqy520/mobx-persist#37 (comment)

App.js

@@ -1,19 +1,20 @@
 import React from 'react'
+import persist from 'mst-persist'
 import { AsyncStorage } from 'react-native'
 import { Provider } from 'mobx-react'
 
 import AppModel from './models/models.js'
-import { persist } from './utils/persist'
 import MainView from './components/mainView.js'
 
 const appStore = AppModel.create()
 
 persist('@mangaStoreKey', appStore, {
   storage: AsyncStorage,
-  jsonify: true // set to true if using AsyncStorage
-}, {
-  mangas: true,
-  favorites: true
+  jsonify: true, // set to true if using AsyncStorage
+  whitelist: [
+    'mangas',
+    'favorites'
+  ]
 })
 
 const App = () => (

package.json

@@ -16,6 +16,7 @@
     "mobx": "^5.9.4",
     "mobx-react": "^5.2.5",
     "mobx-state-tree": "^3.14.0",
+    "mst-persist": "github:agilgur5/mst-persist",
     "react": "16.3.1",
     "react-native": "https://github.com/expo/react-native/archive/sdk-29.0.0.tar.gz"
   },