Config swift versions

Author: prongbang

ScreenProtectorKit.podspec

@@ -8,7 +8,7 @@ Pod::Spec.new do |s|
     s.source           = { :git => 'https://github.com/prongbang/ScreenProtectorKit.git', :tag => "#{s.version}" }
     s.social_media_url = 'https://github.com/prongbang'
     s.platform         = :ios, "10.0"
-    s.swift_version    = "5.0"
+    s.swift_versions   = ["4.0", "4.1", "4.2", "5.0", "5.1", "5.2", "5.3", "5.4", "5.5"]
     s.module_name      = "ScreenProtectorKit"
     s.source_files     = "Sources", "Sources/**/*.{h,m,swift}"
 end