isEmoji doesn't work for emojis with gender modifiers

[4ver]

Passing 🏃‍♂️or 🏃‍♀️to isEmoji returns false.

[vdurmont]

This is true, I wrote a quick test that is failing. I'm going to try to investigate but if you have time, a PR is always welcome!

@Test
  public void isEmoji_with_gender_modifier_returns_true() {
    // GIVEN
    String str = "🏃‍♂";

    // WHEN
    boolean isEmoji = EmojiManager.isEmoji(str);

    // THEN
    assertTrue(isEmoji);
  }

[sullis]

Draft Pull Request: #139