Unescaped quotes work with ASCII but fail with Unicode characters

[TiagoGouvea]

Hi @josdejong !

I just realized that it works fine with ASCII text but fails when Unicode characters (accents) are present.

Works (ASCII):

  const input = '{"message": "She said "hello" to me"}';
  const result = jsonrepair(input);
  // ✅ Works: {"message": "She said \"hello\" to me"}

Fails (Unicode):

  const input = '{"text": "Ela é um "cajuzinho" pra mim"}';
  const result = jsonrepair(input);
  // ❌ Error: Colon expected at position 66

The only difference is the presence of accented characters (é) in the Portuguese text.

Is this a known limitation? Is there any workaround or configuration option to handle Unicode characters with unescaped quotes?