Release 0.8.0

Author: LeoMobileDeveloper

.travis.yml

@@ -1,5 +1,5 @@
-language: objective-c
-osx_image: xcode8.3
+language: swift
+osx_image: xcode9.1
 branches:
   only:
     - master

PullToRefreshKit.podspec

@@ -8,10 +8,10 @@
 
 Pod::Spec.new do |s|
   s.name             = 'PullToRefreshKit'
-  s.version          = '0.7.0'
-  s.summary          = 'A refresh library written with pure Swift 3'
+  s.version          = '0.8.0'
+  s.summary          = 'A refresh library written with pure Swift 4'
   s.description      = <<-DESC
-This is a pull to refresh library written by pure Swift 3. Using it you can add pull to refresh,pull to load more,pull left/right to view details within one line. Besides,it is quite easy to write a custom refresh view when using this lib.
+This is a pull to refresh library written by pure Swift 4. Using it you can add pull to refresh,pull to load more,pull left/right to view details within one line. Besides,it is quite easy to write a custom refresh view when using this lib.
                        DESC
 
   s.homepage         = 'https://github.com/LeoMobileDeveloper/PullToRefreshKit'

README.md

@@ -181,11 +181,12 @@ self.tableView.configRefreshHeader(with: header) { [weak self] in
 
 You just need to write a `UIView` sub class,and make it conforms to these protocols
 
-- RefreshableHeader 
-- RefreshableFooter 
-- RefreshableLeftRight 
+- `RefreshableHeader`
+- `RefreshableFooter`
+- `RefreshableLeftRight` 
 
 For exmaple,to create a custom header
+
 ```
     //Distance from top when in refreshing state
     func heightForRefreshingState()->CGFloat