Fixed namespaces

src/Internals/IndentedPrint.cpp

@@ -1,6 +1,6 @@
 #include "ArduinoJson/Internals/IndentedPrint.h"
 
-using namespace ArduinoJson::Generator;
+using namespace ArduinoJson::Internals;
 
 void IndentedPrint::indent()
 {

src/Internals/JsonNode.cpp

@@ -5,6 +5,8 @@
 #include "ArduinoJson/JsonObject.h"
 #include "ArduinoJson/JsonBuffer.h"
 
+using namespace ArduinoJson::Internals;
+
 void JsonNode::writeTo(JsonWriter& writer)
 {
     switch (type)