Add currency symbols

[Crissov]

According to #453, Libertinus could meet some glyph set requirements if some currency symbols would be added to it:

• [ ] U+20A1 Colon Sign ₡
• [ ] U+20A6 Naira Sign ₦
• [ ] U+20A9 Won Sign ₩
• [ ] U+20AD Kip Sign ₭
• [ ] U+20B2 Guarani Sign ₲
• [ ] U+20B5 Cedi Sign ₵
• [ ] U+20BA Turkish Lira Sign ₺
• [ ] U+20BC Manat Sign ₼
• [ ] U+20BD Ruble Sign ₽ #255