Updated podspec

FolioReaderKit.podspec

@@ -1,13 +1,13 @@
 Pod::Spec.new do |s|
   s.name             = "FolioReaderKit"
-  s.version          = "0.3.8"
+  s.version          = "0.3.9"
   s.summary          = "A Swift ePub reader and parser framework for iOS."
   s.description  = <<-DESC
                    Written in Swift.
                    The Best Open Source ePub Reader.
                    DESC
   s.homepage         = "https://github.com/FolioReader/FolioReaderKit"
-  # s.screenshots     = "www.example.com/screenshots_1", "www.example.com/screenshots_2"
+  s.screenshots     = "https://raw.githubusercontent.com/FolioReader/FolioReaderKit/assets/custom-fonts.gif", "https://raw.githubusercontent.com/FolioReader/FolioReaderKit/assets/highlight.gif"
   s.license          = 'BSD'
   s.author           = { "Heberti Almeida" => "hebertialmeida@gmail.com" }
   s.source           = { :git => "https://github.com/FolioReader/FolioReaderKit.git", :tag => s.version.to_s }