Update to ArduinoJson 7.0.4

lib/ArduinoJson/extras/tests/JsonVariantConst/as.cpp

@@ -0,0 +1,19 @@
+// ArduinoJson - https://arduinojson.org
+// Copyright © 2014-2024, Benoit BLANCHON
+// MIT License
+
+#include <ArduinoJson.h>
+#include <stdint.h>
+#include <catch.hpp>
+
+TEST_CASE("JsonVariantConst::as<T>()") {
+  JsonDocument doc;
+  JsonVariantConst var = doc.to<JsonVariant>();
+
+  doc.set("hello");
+
+  REQUIRE(var.as<bool>() == true);
+  REQUIRE(var.as<long>() == 0L);
+  REQUIRE(var.as<const char*>() == std::string("hello"));
+  REQUIRE(var.as<std::string>() == std::string("hello"));
+}