OpenLens v0.3.0 — In-app updates

OpenLens now keeps itself up to date. It checks GitHub Releases once a day, downloads a newer version in the background, and offers "Install and Restart" in a banner over the preview. You can also use OpenLens › Check for Updates…, and turn the daily check off in the same menu.

Only updates signed with the same Developer ID as the installed app are installed. Installing restarts OpenLens and replaces the camera extension, so a call using the camera loses its picture for a few seconds.

Existing installs (v0.2.3 and earlier) have no updater: install this release manually once.