update changelog/readme for 15.1

Author: nuclearace

CHANGELOG.md

@@ -1,5 +1,6 @@
-# v15.0.1
+# v15.1.0
 
+- Add ability to enable websockets SOCKS proxy.
 - Fix emit completion callback not firing on websockets [#1178](https://github.com/socketio/socket.io-client-swift/issues/1178)
 
 # v15.0.0

README.md

@@ -99,7 +99,7 @@ Then import `import SocketIO`.
 ### Carthage
 Add this line to your `Cartfile`:
 ```
-github "socketio/socket.io-client-swift" ~> 15.0.0
+github "socketio/socket.io-client-swift" ~> 15.1.0
 ```
 
 Run `carthage update --platform ios,macosx`.
@@ -113,7 +113,7 @@ Create `Podfile` and add `pod 'Socket.IO-Client-Swift'`:
 use_frameworks!
 
 target 'YourApp' do
-    pod 'Socket.IO-Client-Swift', '~> 15.0.0'
+    pod 'Socket.IO-Client-Swift', '~> 15.1.0'
 end
 ```