Update podspec version

KeychainSwift.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name        = "KeychainSwift"
-  s.version     = "3.0.4"
+  s.version     = "3.0.6"
   s.license     = { :type => "MIT" }
   s.homepage    = "https://github.com/exchangegroup/keychain-swift"
   s.summary     = "A library for saving text and data in the Keychain with Swift."
@@ -9,6 +9,7 @@ Pod::Spec.new do |s|
 
                 * Write and read text and NSData with simple functions.
                 * Specify optional access rule for the keychain item.
+                * Limit operations to a specific access group.
                 DESC
   s.authors     = { "Evgenii Neumerzhitckii" => "sausageskin@gmail.com" }
   s.source      = { :git => "https://github.com/exchangegroup/keychain-swift.git", :tag => s.version }