message: Fix emojification of symbol characters
  Emojione has graphics for a lot of the symbol / dingbat characters
  which are within the basic multilingual plane, but the new
  fast-path regex was only detecthing surrogate pairs, so not
  counting the symbols as emoji.
diff: @@ -32,7 +32,15 @@ emojione.imagePathPNG = 'emojione/png/';
  // Use SVGs for emojis
  emojione.imageType = 'svg';
  -const SIMPLE_EMOJI_PATTERN = /([\ud800-\udbff])([\udc00-\udfff])/;
  +// Anything outside the basic multilingual plane will be a surrogate pair
  +const SURROGATE_PAIR_PATTERN = /([\ud800-\udbff])([\udc00-\udfff])/;
  +// And there a bunch more symbol characters that emojione has within the
  +// BMP, so this includes the ranges from 'letterlike symbols' to
  +// 'miscellaneous symbols and arrows' which should catch all of them
  +// (with plenty of false positives, but that's OK)
  +const SYMBOL_PATTERN = /([\u2100-\u2bff])/;
  +
  +// And this is emojione's complete regex
  const EMOJI_REGEX = new RegExp(emojione.unicodeRegexp+"+", "gi");
  const COLOR_REGEX = /^#[0-9a-fA-F]{6}$/;
  @@ -44,7 +52,7 @@ const COLOR_REGEX = /^#[0-9a-fA-F]{6}$/;
  * unicodeToImage uses this function.
  */
  export function containsEmoji(str) {
  - return SIMPLE_EMOJI_PATTERN.test(str);
  + return SURROGATE_PAIR_PATTERN.test(str) || SYMBOL_PATTERN.test(str);
  }
  /* modified from https://github.com/Ranks/emojione/blob/master/lib/js/emojione.js
  