Version 3.0.21
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	* added support for pseudoterminals (e.g. /dev/pts/3, Luca Errani)
	* added release notes to the AppData file (Jordan Williams)
	* updated Spanish translation (Daniel Mustieles García)
	* updated Catalan translation (Jordi Mas)
	* updated German translation (Philipp Kiemle)
	* added Dutch translation (Nathan Follens)
	* updated Danish translation (Ask Hjorth Larsen)
	* updated Czech translation (Marek Černocký)