Change source path to local git repo for development cocoas pods

Author: yramanchuk

FirebaseUI_dev.podspec

@@ -5,9 +5,7 @@ Pod::Spec.new do |s|
   s.homepage     = 'https://github.com/firebase/FirebaseUI-iOS'
   s.license      = { :type => 'Apache 2.0' }
   s.author       = 'Firebase'
-  s.source       = {
-    :git => 'https://github.com/firebase/FirebaseUI-iOS.git',
-    :tag => "v#{s.version}"}
+  s.source = { :git => "../../FirebaseUI-iOS.git" }
   s.platform = :ios
   s.ios.deployment_target = '8.0'
   s.ios.framework = 'UIKit'