Bumped version to 3.6.0 (#214)

Author: hiranya911

CHANGELOG.md

@@ -1,14 +1,18 @@
 # Unreleased
 
+# v3.6.0
+
 - [added] `messaging.Aps` type now supports critical sound in its payload.
 - [fixed] Public types in the `messaging` package now support correct
   JSON marshalling and unmarshalling.
+- [fixed] The `VerifyIDToken()` function fnow tolerates a clock skew of up to
+  5 minutes when comparing JWT timestamps.
 
 # v3.5.0
 
 - [added] `messaging.AndroidNotification` type now supports `channel_id`.
 - [dropped] Dropped support for Go 1.8 and earlier.
-- [fixed] Fixing error handling in FCM. The SDK now checks the key 
+- [fixed] Fixing error handling in FCM. The SDK now checks the key
   `type.googleapis.com/google.firebase.fcm.v1.FcmError` to set error code.
 - [added] `messaging.ApsAlert` type now supports subtitle in its payload.
 - [added] `messaging.WebpushConfig` type now supports fcmOptions in its payload.

firebase.go

@@ -39,7 +39,7 @@ import (
 var defaultAuthOverrides = make(map[string]interface{})
 
 // Version of the Firebase Go Admin SDK.
-const Version = "3.5.0"
+const Version = "3.6.0"
 
 // firebaseEnvName is the name of the environment variable with the Config.
 const firebaseEnvName = "FIREBASE_CONFIG"