Extended OnlineClient information variables (#43)

Extends the OnlineClient information variables to include new information. These are client UID, client away information, voice information, client time information, client groups information, client info, client icon, client country, client IP and client badges.

ci: automate releases (#37)

Automate releases using goreleaser to minimise developer work.

Also:
* Update dependencies to address dependabot alert in
   gopkg.in/yaml.v2.

feat: Extend ServerInfo (#28)

Add extended packet stats to ServerConnectionInfo struct

Added resizeable response parsing buffer support

Added the option to resize the buffer used to parse responses from the server.

The new default max buffer size is 10MB which is typically large enough to deal with large single line payload responses such as serversnapshotcreate.