Moved files into Internals/ and Arduino/

tests/EscapedStringTests.cpp

@@ -1,7 +1,7 @@
 #include <gtest/gtest.h>
 
-#include "EscapedString.h"
-#include "StringBuilder.h"
+#include <Internals/EscapedString.h>
+#include <Internals/StringBuilder.h>
 
 using namespace ArduinoJson::Internals;
 

tests/StringBuilderTests.cpp

@@ -1,6 +1,5 @@
 #include <gtest/gtest.h>
-
-#include "StringBuilder.h"
+#include <Internals/StringBuilder.h>
 
 using namespace ArduinoJson::Internals;