chore(m187): update versions for Release 13.1.0 (#16868)

FirebaseAppDistribution.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'FirebaseAppDistribution'
-  s.version          = '13.0.0-beta'
+  s.version          = '13.1.0-beta'
   s.summary          = 'App Distribution for Firebase iOS SDK.'
 
   s.description      = <<-DESC
@@ -30,10 +30,10 @@ iOS SDK for App Distribution for Firebase.
   ]
   s.public_header_files = base_dir + 'Public/FirebaseAppDistribution/*.h'
 
-  s.dependency 'FirebaseCore', '~> 13.0.0'
+  s.dependency 'FirebaseCore', '~> 13.1.0'
   s.dependency 'GoogleUtilities/AppDelegateSwizzler', '>= 8.1.3', '< 9.0'
   s.dependency 'GoogleUtilities/UserDefaults', '>= 8.1.3', '< 9.0'
-  s.dependency 'FirebaseInstallations', '~> 13.0.0'
+  s.dependency 'FirebaseInstallations', '~> 13.1.0'
 
   s.pod_target_xcconfig = {
     'HEADER_SEARCH_PATHS' => '"${PODS_TARGET_SRCROOT}"',