WebKitGTK+ 2.19.91 released!

This is a development release leading toward 2.20 series.

What’s new in the WebKitGTK+ 2.19.91 release?

• Add ENABLE_ADDRESS_SANITIZER to make it easier to build with asan support.
• Fix a crash a under Wayland when using mesa software rasterization.
• Make fullscreen video work again.
• Fix handling of missing GStreamer elements.
• Fix rendering when webm video is played twice.
• Fix kinetic scrolling sometimes jumping around.
• Fix build with ICU configured without collation support.
• Fix several crashes and rendering issues.
• Translation updates: Polish.

Thanks to all the contributors who made possible this release.