Replace IsCyrillic with unicode range
Replace IsCyrillic with unicode range

  IsCyrillic, a char class, is not available for `java.util.regex` on
  Android and when a regex contains it is passed as an argument of
  `java.util.regex.Pattern#complie`, the method throws
  `IllegalArgumentException`.

  To avoid this, replaced `\p{IsCyrillic}` with `\u0400-\u04ff`

  http://unicode.org/charts/PDF/U0400.pdf

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