Bumped version to 4.3.2

update CHANGELOG

-## [4.3.1 - 4.3.0 Patch](https://github.com/rs/SDWebImage/releases/tag/4.3.1)
+## [4.3.2 - 4.3 Patch, on Feb 28th, 2018](https://github.com/rs/SDWebImage/releases/tag/4.3.2)
+See [all tickets marked for the 4.3.2 release](https://github.com/rs/SDWebImage/milestone/23)
+
+#### Fixes
+- Download Operation
+	- Fix that iOS 8 NSURLSessionTaskPriorityHigh symbol not defined in Foundation framework and cause crash #2231 #2230
+
+#### Improvements
+- Downloader
+	- Follow Apple's doc, add NSOperation only after all configuration done #2232
+
+## [4.3.1 - 4.3 Patch, on Feb 25th, 2018](https://github.com/rs/SDWebImage/releases/tag/4.3.1)
 See [all tickets marked for the 4.3.1 release](https://github.com/rs/SDWebImage/milestone/22)
 
 #### Fixes

 Pod::Spec.new do |s|
   s.name = 'SDWebImage'
-  s.version = '4.3.1'
+  s.version = '4.3.2'
 
   s.osx.deployment_target = '10.9'
   s.ios.deployment_target = '7.0'

@@ -15,11 +15,11 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>4.3.1</string>
+	<string>4.3.2</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>4.3.1</string>
+	<string>4.3.2</string>
 	<key>NSPrincipalClass</key>
 	<string></string>
 </dict>