Add auto JSON encoding to `localStorage` & `AsyncStorage` (from React Native)

AsyncObjectStore.js

/**
Utility for React Native's AsyncStorage module.
Auto encodes/decodes using `JSON`. 
Essentially data is saved as key/value to available flash/SD storage.
*/
import { AsyncStorage } from "react-native"

export default {
  setItem(key, value) {
    return AsyncStorage.setItem(key, JSON.stringify(value)) 
  },
  getItem(key) {
    return AsyncStorage.getItem(key)
      .then(data => data ? JSON.parse(data) : undefined)
  },
  removeItem(key) {
    return AsyncStorage.removeItem(key)
  }
}

jsonStore.js

/**
Utility for localStorage browser API w/ auto encoded/decoded data using `JSON`.
*/
const jsonStore = {
  setItem(key, value) {
    value = JSON.stringify(value)
    return localStorage.setItem(key, value) || value
  },
  getItem(key) {
    let value = localStorage.getItem(key)
    return value ? JSON.parse(value) : undefined
  },
  removeItem(key) {
    let value = localStorage.getItem(key)
    if (key) localStorage.removeItem(key)
    return value
  },
  reset() {
    localStorage.clear()
    return true
  } 
}