4.0.0 Release (#1131)

* Update package.json files to 4.0.0

* Update Native SDK Versions

* Remove native iOS files

Motivation: these files were previously there in order to support non-cocoapods integrations. We are removing it here in the major release and will no longer be maintained moving forward.

The manual linking process is likely done by a small portion of developers and introduces more room for error. Cocoapods is pretty standard at this point and can always be added back later or via SwiftPM in the future.

android/build.gradle

@@ -24,7 +24,7 @@ dependencies {
 
     // api is used instead of implementation so the parent :app project can access any of the OneSignal Java
     //   classes if needed. Such as com.onesignal.NotificationExtenderService
-    api 'com.onesignal:OneSignal:4.0.0'
+    api 'com.onesignal:OneSignal:4.1.0'
 
     testImplementation 'junit:junit:4.12'
 }

examples/RNOneSignalTS/package.json

@@ -12,7 +12,7 @@
   "dependencies": {
     "react": "16.13.1",
     "react-native": "0.63.3",
-    "react-native-onesignal": "file:../../"
+    "react-native-onesignal": "4.0.0"
   },
   "devDependencies": {
     "@babel/core": "^7.8.4",