Use tag in podspecs (#152)

Summary:
This diff uses `tag` instead of master branch and also updates the version number to the desktop sdk.
Pull Request resolved: https://github.com/facebook/Sonar/pull/152

Reviewed By: danielbuechele

Differential Revision: D8820016

Pulled By: priteshrnandgaonkar

fbshipit-source-id: ff2e554be55254b77c4e130b35b7299abbafa77d

iOS/SonarKit.podspec

@@ -4,20 +4,20 @@ yogakit_version = '~>1.8'
 
 Pod::Spec.new do |spec|
   spec.name = 'SonarKit'
-  spec.version = '0.0.1'
+  spec.version = '0.6.12'
   spec.license = { :type => 'MIT' }
   spec.homepage = 'https://github.com/facebook/Sonar'
   spec.summary = 'Sonar iOS podspec'
   spec.authors = 'Facebook'
   spec.static_framework = true
   spec.source = { :git => 'https://github.com/facebook/Sonar.git',
-                  :branch=> "master" }
+                  :tag=> "v0.6.12" }
   spec.module_name = 'SonarKit'
   spec.platforms = { :ios => "8.4" }
 
   spec.subspec "Core" do |ss|
     ss.dependency 'Folly', '~>1.0'
-    ss.dependency 'Sonar', '~>0.0.1'
+    ss.dependency 'Sonar', '~>0.6'
     ss.dependency 'CocoaAsyncSocket', '~> 7.6'
     ss.dependency 'PeerTalk', '~>0.0.2'
     ss.dependency 'OpenSSL-Static', '1.0.2.c1'