优化了平衡，尤其对于向后倾倒的几种极限情况进行优化

Shibo-main-TOMMY/lib/ArduinoJson/extras/tests/MixedConfiguration/decode_unicode_1.cpp

@@ -0,0 +1,11 @@
+#define ARDUINOJSON_DECODE_UNICODE 1
+#include <ArduinoJson.h>
+
+#include <catch.hpp>
+
+TEST_CASE("ARDUINOJSON_DECODE_UNICODE == 1") {
+  DynamicJsonDocument doc(2048);
+  DeserializationError err = deserializeJson(doc, "\"\\uD834\\uDD1E\"");
+
+  REQUIRE(err == DeserializationError::Ok);
+}