User Agent Parser for Node.js

The `useragent` package, currently at version 2.3.0, is an abandoned Node.js library designed for parsing user agent strings. It was developed to provide high accuracy by leveraging hand-tuned regular expressions derived from Browserscope's research, aiming to correctly identify browser names and versions where generic parsers might fail. The library differentiated itself through a benchmark-driven approach, claiming superior performance with a pre-compiled regular expression library and deferred parsing for OS and device information. It also offered an optional feature to fetch live, updated parsing rules from remote servers, requiring additional `yamlparser` and `request` dependencies. However, the package has not seen updates since its last publish 8 years ago, indicating it is no longer actively maintained and its user agent data is significantly out of date, making it unsuitable for modern applications.