Bump slixmpp from 1.8.2 to 1.8.3
Bumps [slixmpp](https://lab.louiz.org/poezio/slixmpp ) from 1.8.2 to 1.8.3. --- updated-dependencies: - dependency-name: slixmpp dependency-type: direct:production ... Signed-off-by: dependabot[bot] <support@github.com>