* feat: socket.io 3 changes
* feat: replace socketio-wildcard with socket.onAny
up socket.io-redis to 6.x
* feat: remove mongodb/psql socket.io adapters
* feat: show data on fail
* fix: tests
* fix: typo
* fix: logger test fix
* fix: logger.io_close
* chore: up deps
* chore: update readme to reflect redis requirement
* fix: increase timeout show data if test fails
new method emptydb
use emptydb instead of flushdb, flushdb removes indices for mongo which
breaks search tests
initialize meta.config properly in tests
enable nodebb-plugin-dbsearch for tests
use batch.processArray in notifications.push and moveRecentReplies
added notification tests
added test for moveRecentReplies
clear group cache if a group is deleted