Merge pull request #183 from eggswift/podspec

pod s.swift_version     = '5.0'

ESPullToRefresh.podspec

@@ -1,7 +1,7 @@
 
 Pod::Spec.new do |s|
     s.name              = 'ESPullToRefresh'
-    s.version           = '2.9.2'
+    s.version           = '2.9.3'
     s.summary           = 'An easy way to use pull-to-refresh and loading-more'
     s.description       = 'An easiest way to give pull-to-refresh and loading-more to any UIScrollView. Using swift!'
     s.homepage          = 'https://github.com/eggswift/pull-to-refresh'
@@ -14,4 +14,5 @@ Pod::Spec.new do |s|
     s.source_files      = ['Sources/**/*.{swift}']
     s.resource_bundles  = { 'ESPullToRefresh' => 'Sources/Animator/*.png' }
     s.requires_arc      = true
+    s.swift_version     = '5.0'
 end

README.md

@@ -18,7 +18,7 @@
 * Xcode 8 or later
 * iOS 8.0 or later
 * ARC
-* Swift 2.3 or later
+* Swift 5.0 or later
 
 ## Features
 

README_CN.md

@@ -18,7 +18,7 @@
 * Xcode 8 or later
 * iOS 8.0 or later
 * ARC
-* Swift 2.3 or later
+* Swift 5.0 or later
 
 ## 特性