Log Message:
ruby-twitter-text: update to 3.0.0.

Upstream pull request log:
https://github.com/twitter/twitter-text/pull/265

* New v3.json config file with emojiParsingEnabled config option. When
  true, twitter-text will parse and discount emoji supported by the
  twemoji library (see https://github.com/twitter/twemoji). The length
  of these emoji will be the default weight (200 or two characters) even
  if they contain multiple code points combined by zero-width
  joiners. This means that emoji with skin tone and gender modifiers no
  longer count as more characters than those without such modifiers.
  All 4 implementations updated to reflect this change in counting.
* Updates known gTLDs to recognize recent additions by IANA (#261)