Add support for Facebook Emojis

[Rosadojonathan]

Hey there!
I was using vaderSentiment to analyze Facebook comments on my ads and I realized that comments that used Facebook emojis were parsed as neutral {'pos': 0.0, 'neg': 0.0, 'compound': 0.0, 'neu': 1.0}
example ->
Plus de 50 euros de frais de réservation, je trouve ça très exagéré !!😡
However, if I removed the Facebook emoji from a sentence that used those emojis I would get actual scores, for instance : {'pos': 0.0, 'neu': 0.834, 'compound': -0.2465, 'neg': 0.166}

Do you know why Facebook Emojis make the whole sentence neutral? Do you plan to add support for these emojis?

Thanks!

[cjhutto]

Got this fix in. Thanks!