Bump podspec

PIALibrary.podspec

 Pod::Spec.new do |s|
     s.name              = "PIALibrary"
-    s.version           = "1.1.0"
+    s.version           = "1.1.1"
     s.summary           = "PIA client library in Swift."
 
     s.homepage          = "https://www.privateinternetaccess.com/"