Add default argument for api_patch

src/launchpad.h

@@ -74,7 +74,7 @@ public:
                                         const std::map<std::string, std::string>& params = {},
                                         bool build_endpoint = true,
                                         const std::string& token_secret_override = "");
-    std::optional<std::string> api_patch(const std::string& endpoint = "", const nlohmann::json& data);
+    std::optional<std::string> api_patch(const std::string& endpoint = "", const nlohmann::json& data = nlohmann::json{});
     std::optional<std::string> api_delete(const std::string& endpoint = "");
 
     std::string build_full_url(const std::string& endpoint) const;