The library powering the user agent utils enrichment has now been declared as end of life and won’t receive any updates: www.bitwalker.eu/software/user-agent-utils.
Because this could one day result in a potential security issue (due to lack of maintenance), we encourage everyone to move away from this enrichment in favor of the ua parser enrichment.
However, please keep in mind that this is not a drop-in replacement: the ua parser enrichment will fill an external com_snowplowanalytics_snowplow_ua_parser_context_1 table (you can find the Iglu schema here) instead of a few fields in atomic.events.
In the future, we will move the fields affected by the user agent utils enrichments out of atomic.events into their own context and, as a follow up, remove it entirely.