chore: update version to 0.23.0 and add Swift Package Manager support

Author: DennisAlund

CHANGELOG.md

@@ -1,3 +1,6 @@
+## 0.23.0
+- iOS: Add Swift Package Manager (SPM) support (fixes [#464](https://github.com/oddbit/flutter_facebook_app_events/issues/464))
+
 ## 0.22.1
 - Fix Android crash when `setUserData()` is called with null fields (fixes [#462](https://github.com/oddbit/flutter_facebook_app_events/issues/462))
 

example/pubspec.lock

@@ -47,7 +47,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "0.22.1"
+    version: "0.23.0"
   fake_async:
     dependency: transitive
     description:

ios/facebook_app_events.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'facebook_app_events'
-  s.version          = '0.22.1'
+  s.version          = '0.23.0'
   s.summary          = 'Flutter plugin for Facebook Analytics and App Events'
   s.description      = <<-DESC
 Flutter plugin for Facebook Analytics and App Events

pubspec.yaml

@@ -1,7 +1,7 @@
 name: facebook_app_events
 description: Flutter plugin for Facebook App Events, an app measurement
   solution that provides insight on app usage and user engagement in Facebook Analytics.
-version: 0.22.1
+version: 0.23.0
 homepage: https://github.com/oddbit/flutter_facebook_app_events
 
 environment: