chore(release): update versions to 13.2.0 (#16970)

Updated versions to 13.2.0 in preparation for the next release.

FirebaseRemoteConfigInterop.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'FirebaseRemoteConfigInterop'
-  s.version          = '13.1.1'
+  s.version          = '13.2.0'
   s.summary          = 'Interfaces that allow other Firebase SDKs to use Remote Config functionality.'
 
   s.description      = <<-DESC