WebKitGTK+ 2.21.92 released!

This is a development release leading toward 2.22 series.

What’s new in the WebKitGTK+ 2.21.92 release?

• Add new API to inject/register user content in isolated worlds.
• Add more API to JSCException to handle column number, convert exception to string, get the exception backtrace, create exceptions with a custom error name and report exception message with full details.
• Fix excessive CPU usage when getting the process memory footprint.
• Fix several crashes and rendering issues.
• Translation updates: Polish

Thanks to all the contributors who made possible this release.