docs: add info that storage is still unencrypted (#100)

pbitkowski · Krzysztof Borowy · commit bfa35cc589f3 · 2019-05-10T15:50:31.000+02:00
diff --git a/README.md b/README.md
@@ -1,6 +1,6 @@
 # React Native Async Storage
 
-An asynchronous, persistent, key-value storage system for React Native.
+An asynchronous, unencrypted, persistent, key-value storage system for React Native.
 
 
 ## Getting Started
