support UTF-16 LE and BE #17
Description
inline const static std::u16string c_utf16Bom{ u"\xfeff" };
shows that you support only UTF16 LE, but UTF16 BE has swapped signature: FF FE.
{{ message }}
inline const static std::u16string c_utf16Bom{ u"\xfeff" };
shows that you support only UTF16 LE, but UTF16 BE has swapped signature: FF FE.