feat: make body editable on proxy client req listeners

src/unlocker/spoofing.cpp

@@ -51,7 +51,7 @@ void Spoofer::registerListeners(Proxy* proxy)
         this->serverResponseHandler(url, body, respHeaders);
     });
 
-    proxy->OnClientRequest.addListener([this](std::string& url, const std::string& body, std::string& reqHeaders) {
+    proxy->OnClientRequest.addListener([this](const std::string& url, std::string& body, std::string& reqHeaders) {
         this->clientRequestHandler(url, body, reqHeaders);
     });
 }