This update for torbrowser-launcher fixes the following issues:

- Add new key from upstream tor-browser as source and overwrite
bundled key in tarball with this
(gh#micahflee/torbrowser-launcher#481).
- Fixed version checking with torbrowser 10.0+; patch taken from upstream PR
(not yet merged) [gh#micahflee/torbrowser-launcher#499].
- Add further fixes to torbrowser-launcher-apparmor-fixes.patch
to enable bundled libstdc++ to be mapped; fixes taken from
pending upstream PR (gh#micahflee/torbrowser-launcher#503).