refactor: mark async storage as optional peer dependency

Context: segmentio/sovran-react-native#44

Author: mateusz1913

README.md

@@ -50,12 +50,19 @@ The hassle-free way to add Segment analytics to your React-Native app.
 
 ## Installation
 
-Install `@segment/analytics-react-native`,  [`@segment/sovran-react-native`](https://github.com/segmentio/sovran-react-native) and [`react-native-async-storage/async-storage`](https://github.com/react-native-async-storage/async-storage): 
+Install `@segment/analytics-react-native`,  [`@segment/sovran-react-native`](https://github.com/segmentio/sovran-react-native): 
 
 ```sh
-yarn add @segment/analytics-react-native @segment/sovran-react-native @react-native-async-storage/async-storage 
+yarn add @segment/analytics-react-native @segment/sovran-react-native
 # or
-npm install --save @segment/analytics-react-native @segment/sovran-react-native @react-native-async-storage/async-storage
+npm install --save @segment/analytics-react-native @segment/sovran-react-native
+```
+
+If using default persistor for the Segment Analytics client, install [`react-native-async-storage/async-storage`](https://github.com/react-native-async-storage/async-storage) (for more context, check <a href="#client-options">Client Options's `storePersistor`</a>):
+```sh
+yarn add @react-native-async-storage/async-storage 
+# or
+npm install --save @react-native-async-storage/async-storage
 ```
 
 For iOS, install native modules with:

packages/core/package.json

@@ -46,17 +46,22 @@
   },
   "homepage": "https://github.com/segmentio/analytics-react-native#readme",
   "dependencies": {
-    "@react-native-async-storage/async-storage": "^1.15.17",
     "@segment/sovran-react-native": "^0.4.5",
     "deepmerge": "^4.2.2",
     "js-base64": "^3.7.2",
     "promise.allsettled": "^1.0.5",
     "react-native-uuid": "^2.0.1"
   },
   "peerDependencies": {
+    "@react-native-async-storage/async-storage": "*",
     "react": "*",
     "react-native": "*"
   },
+  "peerDependenciesMeta": {
+    "@react-native-async-storage/async-storage": {
+      "optional": true
+    }
+  },
   "devDependencies": {
     "@babel/core": "^7.12.9",
     "@babel/runtime": "^7.12.5",

packages/core/src/__mocks__/@react-native-async-storage/async-storage.js

@@ -1 +1 @@
-export default from '@react-native-async-storage/async-storage/jest/async-storage-mock';
+export default '@react-native-async-storage/async-storage/jest/async-storage-mock';

yarn.lock

@@ -2256,7 +2256,7 @@
   dependencies:
     "@octokit/openapi-types" "^12.10.0"
 
-"@react-native-async-storage/async-storage@^1.15.15", "@react-native-async-storage/async-storage@^1.15.17":
+"@react-native-async-storage/async-storage@^1.15.15":
   version "1.17.7"
   resolved "https://registry.yarnpkg.com/@react-native-async-storage/async-storage/-/async-storage-1.17.7.tgz#f9213e8cc6202a8c29df5a4da1db588f3b0fa8a9"
   integrity sha512-mDtWhCcpxzrZhA95f6zi0pnBsjBEZW1LKZWfxVXG0UfaWpPxDBCKowNk2xjRTytckZeVhjmPJPtBU+8QNQcR0A==