Update CI image to latest GStreamer git (!544) · Merge requests · GStreamer / gstreamer-rs · GitLab

Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.

Sebastian Dröge requested to merge slomo/gstreamer-rs:ci-update into master Jul 05, 2020

And also update meson to 0.54.3