Overview of changes in gnome-calculator 3.21.90
* Updated Hebrew translation (Yosef Or Boczko)
* Added 'period' keypress when the delete key on the numpad is pressed. (Myridium)
* Updated Spanish translation (Daniel Mustieles)
* lib: prevents segfault when elements of division to zero have null assigned tokens (fixes #769364) (Alberto Ruiz)
* Add Language headers to po files (Piotr Drąg)
* Updated Swedish translation (Anders Jonsson)
* Updated Friulian translation (Fabio Tomat)
* Updated Indonesian translation (cherry picked from commit da3a093148c5f9340c6566fe35d5a38b5aa04e6b) (Andika Triwidada)
* Updated Occitan translation (Cédric Valmary)