Bumped version to 4.4.1

update CHANGELOG

+## [4.4.1 - 4.4 patch, on June 7th, 2018](https://github.com/rs/SDWebImage/releases/tag/4.4.1)
+See [all tickets marked for the 4.4.1 release](https://github.com/rs/SDWebImage/milestone/26)
+	
+#### Fixes
+- Coder
+	- Fix that WebP (including Animated WebP) decoding issue on iOS 12 #2348 #2347
+- Downloader
+	- Fix that the downloader operation may not call the completion block when requesting the same image url in race condition #2346 #2344
+
 ## [4.4.0 - watchOS View Category, on May 31st, 2018](https://github.com/rs/SDWebImage/releases/tag/4.4.0)
 See [all tickets marked for the 4.4.0 release](https://github.com/rs/SDWebImage/milestone/25)
 

 Pod::Spec.new do |s|
   s.name = 'SDWebImage'
-  s.version = '4.4.0'
+  s.version = '4.4.1'
 
   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>4.4.0</string>
+	<string>4.4.1</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>4.4.0</string>
+	<string>4.4.1</string>
 	<key>NSPrincipalClass</key>
 	<string></string>
 </dict>