sdk fixes:

- update swift_version = 4.2
- changed http method for hit.gif request from POST to GET
- do not send hit.gif request if no kitTcode

Author: mbi88

.swift-version

@@ -4,7 +4,7 @@
 [![Platform](https://img.shields.io/cocoapods/p/UserReport.svg?style=flat)](http://cocoadocs.org/docsets/UserReport)
 ![Xcode 9.0](https://img.shields.io/badge/Xcode-9.0-blue.svg)
 ![iOS 9.0+](https://img.shields.io/badge/iOS-9.0%2B-blue.svg)
-![Swift 4.0](https://img.shields.io/badge/Swift-4.0-orange.svg)
+![Swift 4.2](https://img.shields.io/badge/Swift-4.2-orange.svg)
 [![License](https://img.shields.io/cocoapods/l/UserReport.svg)](https://raw.githubusercontent.com/AudienceProject/userreport-ios-sdk/master/LICENSE)
 
 

README.md

@@ -121,4 +121,5 @@ Pod::Spec.new do |s|
   # s.xcconfig = { "HEADER_SEARCH_PATHS" => "$(SDKROOT)/usr/include/libxml2" }
   # s.dependency "JSONKit", "~> 1.4"
 
+  s.swift_version = '4.2' 
 end

UserReport.podspec

@@ -82,14 +82,18 @@ internal class Network {
     func audiences(info: Info, completion: @escaping ((Result<Empty>) -> Void)) {
         //https://visitanalytics.userreport.com/hit.gif?t=[kitTcode]&rnd=%RANDOM%&d=IDFA&med=app_name
         let appName = Bundle.main.infoDictionary![kCFBundleNameKey as String] as! String
-        let kitTcode = info.mediaSettings?.kitTcode
-        let tCode = (kitTcode != nil) ? "t=\(kitTcode!)&" : ""
+        
+        guard let kitTcode = info.mediaSettings?.kitTcode else {
+            return
+        }
+        
+        let tCode = "t=\(kitTcode)&"
         let random = arc4random_uniform(UInt32.max)
         let idfa = info.user?.idfa ?? ""
         let url = URL(string: "\(self.server.audiences)/hit.gif?\(tCode)rnd=\(random)&d=\(idfa)&med=\(appName)")
         self.userAgent { (userAgent) in
             let headers = ["User-Agent": userAgent]
-            self.sendRequest(httpMethod: HTTPMethod.POST, url: url, headers: headers, body: nil, emptyReponse: true, completion: completion)
+            self.sendRequest(httpMethod: HTTPMethod.GET, url: url, headers: headers, body: nil, emptyReponse: true, completion: completion)
         }
     }