title: TypeError: null is not an object (evaluating 'RNKeychainManager.SECURITY_LEVEL_ANY')
body: <p>I am going to use the react-native-keychain lib in my RN project but seems to be not working on my local.</p>
  <p>RN: 0.61.5</p>
  <p>react-native-keychain: &quot;6.1.1&quot;,</p>
  <p>I tried to like this.</p>
  <pre><code>.......
  
  const MEMORY_KEY_PREFIX = '@MyStorage:'
  let dataMemory = {}
  
  class MyStorage {
    static syncPromise = null
  
    static setItem(key, value) {
      Keychain.setGenericPassword(MEMORY_KEY_PREFIX + key, value)
      dataMemory[key] = value
      return dataMemory[key]
    }
  
    static getItem(key) {
      return Object.prototype.hasOwnProperty.call(dataMemory, key) ? dataMemory[key] : undefined
    }
  
    static removeItem(key) {
      Keychain.resetGenericPassword()
      return delete dataMemory[key]
    }
  
    static clear() {
      dataMemory = {}
      return dataMemory
    }
  }
  .......
  
  </code></pre>
  <p>But I am facing issues.</p>
  <p>TypeError: null is not an object (evaluating 'RNKeychainManager.SECURITY_LEVEL_ANY')</p>
  <p>Is there any solution to fix it?</p>
  <p>Thanks</p>