Bump to latest iOS (3.10.0) & Android 4.6.6 SDKs

Author: jkasten2

android/build.gradle

@@ -34,5 +34,5 @@ android {
 }
 
 dependencies {
-    api 'com.onesignal:OneSignal:4.6.3'
+    api 'com.onesignal:OneSignal:4.6.6'
 }

ios/onesignal_flutter.podspec

@@ -13,7 +13,7 @@ Pod::Spec.new do |s|
   s.source_files = 'Classes/**/*'
   s.public_header_files = 'Classes/**/*.h'
   s.dependency 'Flutter'
-  s.dependency 'OneSignalXCFramework', '3.9.1'
+  s.dependency 'OneSignalXCFramework', '3.10.0'
   s.ios.deployment_target = '9.0'
   s.static_framework = true
 end