3.30.0
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* Fixed build with GCC 8 (Michael Catanzaro)
* Updated translations:
  cs    (Marek Cernocky)
  da    (Ask Hjorth Larsen)
  el    (Efstathios Iosifidis)
  fr    (Guillaume Bernard)
  fur   (Fabio Tomat)
  hu    (Gábor Kelemen)
  is    (Sveinn í Felli)
  ko    (Seong-ho Cho)
  tr    (Emin Tufan Çetin)
  zh_CN (Mingcong Bai)