Poco::Json::Object::stringify represents UTF-8 encoed string as unicode escaped characters when JSON object contains an array.

Expected behavior

"{"hints":["Пример", "Пример", "Пример", "Пример"],"id":7}"

Actual behavior

"{"hints":["\u041F\u0440\u0438\u043C\u0435\u0440","\u041F\u0440\u0438\u043C\u0435\u0440","\u041F\u0440\u0438\u043C\u0435\u0440","\u041F\u0440\u0438\u043C\u0435\u0440"],"id":7}"

Steps to reproduce the problem

Construct a JSON object containing an array with cyrilic UTF-8 encoded string

POCO version

1.9.0

Compiler and version

Visual studio 2017

Operating system and version

Windows 7 x64 Pro

Other relevant information

When object doesn't contain an array, no unicode characters escaped. But when an array present in object unicode escape take place.

Is this OK?
Object.h line 297:
inline void Object::setEscapeUnicode(bool escape)
{
_escapeUnicode = true; //Always true???
}
Array.h line 217:
inline void Array::setEscapeUnicode(bool escape)
{
_escapeUnicode = true; //Always true???
}