fix: add client method in HTTPServer

Author: ayushsharma82

libraries/WebServer/src/HTTPServer.h

@@ -115,6 +115,9 @@ class HTTPServer {
     HTTPMethod method() {
         return _currentMethod;
     }
+    WiFiClient& client() {
+        return _client;
+    }
     HTTPUpload& upload() {
         return *_currentUpload;
     }