Bump NWWebSocket library

Author: fbenevides

PusherSwift.podspec

@@ -13,7 +13,7 @@ Pod::Spec.new do |s|
   s.source_files  = ['Sources/**/*.swift']
 
   s.dependency 'TweetNacl', '~> 1.0.0'
-  s.dependency 'NWWebSocket', '~> 0.5.2'
+  s.dependency 'NWWebSocket', '~> 0.5.3'
 
   s.ios.deployment_target = '13.0'
   s.osx.deployment_target = '10.15'

README.md

@@ -1163,7 +1163,7 @@ For full details see the [client events documentation](https://pusher.com/docs/c
 
 There are a set of tests for the library that can be run using the standard method (Command-U in Xcode).
 
-The tests also get run on [Travis-CI](https://travis-ci.org/pusher/pusher-websocket-swift). See [.travis.yml](https://github.com/pusher/pusher-websocket-swift/blob/master/.travis.yml) for details on how the Travis tests are run.
+The tests also get run on Github Actions, see [CI Action](https://github.com/pusher/pusher-websocket-swift/actions/workflows/ci.yml)
 
 ## Extensions