Release 1.5.30

• Update translations from zanata (de, pl, uk updated)
• Use string order as a fallback to cldr_order in category listings
• The rainbow flag should be a zwj sequence
• Also display the Unicode version in the emoji info popover
• When looking up emoji or other characters via Unicode codepoint,
  ignore surrogates and private use characters
• Show the fonts really used to render an emoji in the
  info popover for the emoji
• Fix typo in translatable string
• itb_emoji.py: Use CLDR order to sort the candidates and
  the similar emoji if score is the same