Fixed implementation error of emoji.distinct_emoji_lis

[daima3629]

This library had a distinct_emoji_lis function to distinct list of emojis from the string, but it didn't work correctly due to an implementation error.
It has been fixed, please review it.

[TahirJalilov]

@daima3629 Thank's for your PR.
This is really a bug, but your changes do not return the distinct list of emojis from the string. I mean try to check it with the string where the same emoji appears more than once.
I think the best solution to fix this emoji.distinct_emoji_lis() it's just to add a language key.

def distinct_emoji_lis(string, language='en'):
    """Returns distinct list of emojis from the string."""
    distinct_list = list(
        {c for c in string if c in unicode_codes.UNICODE_EMOJI[language]}
    )
    return distinct_list

Could you please, also add to the test_distinct_emoji_lis() assertion to check the distinct of emojis if the same emoji appears more than once? Something like this:
assert emoji.distinct_emoji_lis('Hi, I am fine. 😁😁😁😁') == ['😁']

[daima3629]

@TahirJalilov Thank you for your review.
I'll improve on the points you mentioned, please wait a moment.

[daima3629]

Fixed problems.
And a test has been changed slightly because the order of the list is not guaranteed due to the use of set.

[TahirJalilov]

Thank you!

[daima3629]

You're welcome! Thank you too!