[ios] add fcm token handling

fixes #789
Add deleteEntityToken and getEntityToken methods #779

[android] broadcast token refresh event after boostrap

in Android token refresh event usually fires before React instance is ready.
The fix works similar to notification that waits React instance to bootstrap before firing

use #import "Firebase.h"

[Potential breaking changes]
use #import "Firebase.h" to fix #777

Add support for notification actions on iOS

#773

fix android schedule notification crash

v11.3.1

Update package.json

updated react-native-fcm.podspec with dependency

v11.3.0

Update package.json

[android] fix fail notification schedule after reboot

v11.2.0

Update package.json

[android] add wake_screen

v11.1.0

Update README.md

[android] fix notification not showing up for kitkat below with group

v11.0.2

bump version

arch cleanup

• fixed the issue where multiple apps using this library interfering with each other
• limited iOS header look path to allow project integrating with react through CocoaPods
  • non-pod user needs to put frameworks under ios/Frameworks
  • no changes required for Pod user