WebKitGTK 2.45.4 released!

This is a development release leading toward 2.46 series.

Enable offscreen canvas by default in production builds too.
Fix video flickering with DMA-BUF sink.
Fix movement delta on mouse events in GTK3.
Fix accelerated images dissapearing after scrolling.
Bubblewrap sandbox no longer kills auxiliary process when UI process terminates.
Fix rendering of shadows with several compositing operators.
Implement FEDropShadow and FEComponentTransfer filters using Skia.
Undeprecate webkit_back_forward_list_item_get_title().
Undeprecate console message API and make it available in 2022 API.
Fix several crashes and rendering issues.

Thanks to all the contributors who made possible this release.