Node-Redis potential exponential regex in monitor mode
### Impact
When a client is in monitoring mode, the regex begin used to detected monitor messages could cause exponential backtracking on some strings. This issue could lead to a denial of service.
### Patches
The problem was fixed in commit `2d11b6d`
https://github.com/NodeRedis/node-redis/commit/2d11b6dc9b9774464a91fb4b448bad8bf699629e and was released in version `3.1.1`.
### References
#1569 (GHSL-2021-026)