Auth and Messaging Interop for Swift (#9314)

FirebaseAuthInterop.podspec

@@ -0,0 +1,30 @@
+Pod::Spec.new do |s|
+  s.name             = 'FirebaseAuthInterop'
+  s.version          = '8.12.0'
+  s.summary          = 'Interfaces that allow other Firebase SDKs to use Auth functionality.'
+
+  s.description      = <<-DESC
+  Not for public use.
+  A set of protocols that other Firebase SDKs can use to interoperate with FirebaseAuth in a safe
+  and reliable manner.
+                       DESC
+
+  s.homepage         = 'https://firebase.google.com'
+  s.license          = { :type => 'Apache', :file => 'LICENSE' }
+  s.authors          = 'Google, Inc.'
+
+  # NOTE that these should not be used externally, this is for Firebase pods to depend on each
+  # other.
+  s.source           = {
+    :git => 'https://github.com/firebase/firebase-ios-sdk.git',
+    :tag => 'CocoaPods-' + s.version.to_s
+  }
+  s.social_media_url = 'https://twitter.com/Firebase'
+  s.ios.deployment_target = '10.0'
+  s.osx.deployment_target = '10.12'
+  s.tvos.deployment_target = '10.0'
+  s.watchos.deployment_target = '6.0'
+
+  s.source_files = 'FirebaseAuth/Interop/*.[hm]'
+  s.public_header_files = 'FirebaseAuth/Interop/*.h'
+end