Replaced printTo() with serializeJson()

* Added `serializeJson()` and `serializeJsonPretty()`
* Added `measureJson()` and `measureJsonPretty()`
* Removed `printTo()` and `prettyPrintTo()`
* Removed `measureLength()` and `measurePrettyLength()`

src/ArduinoJson/JsonVariantBase.hpp

@@ -8,17 +8,15 @@
 #include "JsonVariantComparisons.hpp"
 #include "JsonVariantOr.hpp"
 #include "JsonVariantSubscripts.hpp"
-#include "Serialization/JsonPrintable.hpp"
 
 namespace ArduinoJson {
 namespace Internals {
 
 template <typename TImpl>
-class JsonVariantBase : public JsonPrintable<TImpl>,
-                        public JsonVariantCasts<TImpl>,
+class JsonVariantBase : public JsonVariantCasts<TImpl>,
                         public JsonVariantComparisons<TImpl>,
                         public JsonVariantOr<TImpl>,
                         public JsonVariantSubscripts<TImpl>,
                         public JsonVariantTag {};
-}
-}
+}  // namespace Internals
+}  // namespace ArduinoJson