Fix podspec for iOS 7 only

Author: Dimillian

DMCustomModalViewController.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = 'DMCustomModalViewController'
-  s.version      = '1.0'
+  s.version      = '1.0.1'
   s.summary      = 'A cool modal transition'
   s.homepage     = 'https://github.com/Dimillian/DMCustomModalViewController.git'
   s.author = {
@@ -10,7 +10,7 @@ Pod::Spec.new do |s|
     :git => 'https://github.com/Dimillian/DMCustomModalViewController.git',
     :tag => '1.0'
   }
-  s.ios.deployment_target = '7.0'
+  s.platform = :ios, '7.0'
   s.source_files = 'classes/*.{h,m}'
   s.requires_arc =  true
   s.license = 'MIT'