SUSE-SU-2020:1992-1 Security update for webkit2gtk3

This update for webkit2gtk3 fixes the following issues: - Update to version 2.28.3 bsc1173998: + Enable kinetic scrolling with async scrolling. + Fix web process hangs on large GitHub pages. + Bubblewrap sandbox should not attempt to bind empty paths. + Fix threading issues in the media player. +...