WebKitGTK 2.50.2 released!

This is a bug fix release in the stable 2.50 series.

Prevent unsafe URI schemes from participating in media playback.
Make jsc_value_array_buffer_get_data() function introspectable.
Fix logging in to Google accounts that have a WebAuthn second factor configured.
Fix loading webkit://gpu when there are no threads configured for GPU rendering.
Fix rendering gradiants that use the CSS hue interpolation method.
Fix pasting image data from the clipboard.
Fix font-family selection when the font name contains spaces.
Fix the build with standard C libraries that lack execinfo.h, like Musl or uClibc.
Fix capturing canvas snapshots in the Web Inspector.
Fix several crashes and rendering issues.

Thanks to all the contributors who made possible this release.