UTS #51: add skin-tone/gender info for groups (revised)

This is the information from the Unicode Consortium Proposal L2/18-223. This proposal contains 5 Emojis.

Proposal Number	L2/18-223
Proposal Name	UTS #51: add skin-tone/gender info for groups (revised)
Proposal From	Mark Davis
Proposal date	2018
Proposal File	No.223,2018 PDF:R UTS51 SKIN TONE GENDER No.223,2018 PDF:UTS51 SKIN TONE GENDER

Emoji Symbol	Code point
🧑‍🤝‍🧑 People Holding Hands	1F9D1 200D 1F91D 200D 1F9D1
🧑🏿‍🤝‍🧑🏿 People Holding Hands: Dark Skin Tone	1F9D1 1F3FF 200D 1F91D 200D 1F9D1 1F3FF
👭🏿 Women Holding Hands: Dark Skin Tone	1F46D 1F3FF
👫🏿 Woman And Man Holding Hands: Dark Skin Tone	1F46B 1F3FF
👬🏿 Men Holding Hands: Dark Skin Tone	1F46C 1F3FF

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