Add User-Agent header to requests

Author: OndraFiedler

README.md

@@ -46,7 +46,7 @@ https://github.com/recombee/swift-api-client
 Alternatively, in `Package.swift`:
 
 ```swift
-.package(url: "https://github.com/recombee/swift-api-client", from: "5.0.0")
+.package(url: "https://github.com/recombee/swift-api-client", from: "5.0.1")
 ```
 
 Then add to your target dependencies:

Sources/RecombeeClient/ApiClient/RecombeeClient.swift

@@ -96,6 +96,7 @@ public class RecombeeClient {
         urlRequest.httpMethod = request.method.rawValue
         urlRequest.timeoutInterval = request.timeout
         urlRequest.addValue("application/json", forHTTPHeaderField: "Content-Type")
+        urlRequest.addValue("recombee-swift-api-client/5.0.1", forHTTPHeaderField: "User-Agent")
 
         if let body = request.bodyParameters {
             urlRequest.httpBody = try JSONEncoder().encode(AnyCodable(body))