update cocoa pod version to 0.6.2

Author: yramanchuk

FirebaseUI.podspec

@@ -4,8 +4,7 @@ Pod::Spec.new do |s|
   s.summary      = 'UI binding libraries for Firebase.'
   s.homepage     = 'https://github.com/firebase/FirebaseUI-iOS'
   s.license      = { :type => 'Apache 2.0', :file => 'FirebaseUIFrameworks/LICENSE' }
- # s.source       = { :http => 'https://github.com/firebase/FirebaseUI-iOS/releases/download/v0.6.2/FirebaseUIFrameworks.zip' }
-   s.source = { :http => "file:///Users/yuryr/Documents/work/git/FirebaseUI-iOS/FirebaseUIFrameworks.zip" }
+  s.source       = { :http => 'https://github.com/firebase/FirebaseUI-iOS/releases/download/v0.6.2/FirebaseUIFrameworks.zip' }
   s.author       = 'Firebase'
   s.platform = :ios
   s.ios.deployment_target = '8.0'