Converts an emoji name such as "deer",
(see EmojiDb.get_unicode_dict(), a markdown
emoji identifier such as ":deer:" (see GitHub) or a single unicode
character to a unicode sequence.
Does not alter the value if a unicode sequence was passed already.
Parameters
identifier (Union[str, list[str]]) – The emoji identifier, either it’s name such as “deer”,
it’s markdown name such as “:deer:” or a single unicode character
like 🦌 a unicode sequence as list of strings.