update podspec for 0.5.2

Author: Ryan Maxwell

UIAlertController+Blocks.podspec

@@ -1,12 +1,12 @@
 Pod::Spec.new do |s|
   s.name         = "UIAlertController+Blocks"
-  s.version      = "0.5.1"
+  s.version      = "0.5.2"
   s.summary      = "Convenience methods for UIAlertController"
   s.homepage     = "https://github.com/ryanmaxwell/UIAlertController-Blocks"
   s.license      = { :type => 'MIT', :file => 'LICENSE' }
   s.author       = "Ryan Maxwell"
-  s.source       = { :git => "https://github.com/ryanmaxwell/UIAlertController-Blocks.git", :tag => '0.5.1' }
+  s.source       = { :git => "https://github.com/ryanmaxwell/UIAlertController-Blocks.git", :tag => '0.5.2' }
   s.source_files  = 'UIAlertController+Blocks.{h,m}'
   s.requires_arc = true
-  s.platform = 'ios', '6.0' # 6.0 as this is a dependency for RMUniversalAlert, and also requires __weak
+  s.platform = 'ios', '6.0' # 6.0 as this is a dependency for RMUniversalAlert
 end